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Contract No G5MA-CT-2002-04062 First Annual Progress Report CEMOS

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Center of Excellence CEMOS

Physics and Technology of Semiconductor Materials and Structures for Optoelectronics

and Spintronics Warsaw University Institute of Experimental Physics Division of Solid State Physics Address: ul. Hoża 69, 00-681 Warsaw, POLAND Phone: (+4822) 6287649, (+4822) 5532151 Fax: (+4822) 6219712 E-mail: [email protected]

The First Annual Progress Report

Reporting Period: 01.01.2003-31.12.2003 Report issued on: 15.02.2004 Contract number: G5MA-CT-2002-04062 Project start date: 01.01.2003, duration: 36 months EU funding (€): 220000 Keywords: optoelectronics, spintronics Name of scientific coordinator: prof. Marian Grynberg Name of contact person: dr Jacek Przybytek


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Table Of Contents Front Page 1

Table Of Contents 2

1. Activity Progress Report 3

1.1 Description of the Activities 3

2. Workpackages Progress Report 5

2.1 WORKPACKAGE No: 1 5









3. Updated Planning Sheet 14

4. Annexes 16

4.1) Conference and Workshop reports 16

4.2) Papers and Publications 20


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1. ACTIVITY PROGRESS REPORT

Description of the Activities WP1 Semiconductors in optoelectronics and spintronics - a special session during the Jaszowiec summer school

Conference: XXXII International School on the Physics of Semiconducting Compounds was held in Jaszowiec, 30.05-6.06.2003. There were 193 participants from 18 countries, among them: 20 from EU countries, 147 from Poland, and 12 from new accessing EU members. Among 6 invited speakers of a tutorial session and 15 of a regular conference part there were 10 speakers from EU countries. The program of the regular conference part of the Jaszowiec School is given in Appendix 4.1 The book of abstracts is attached.

Within the WP 1 activity the special session day - "Semiconductors in spintronics and optoelectronics" was organized on 3.06.2003. The day involved 3 invited lectures, a panel discussion, 6 oral contribution and a poster session with 36 accepted posters. The panel discussion entitled "Ferromagnetic Semiconductors" was moderated by prof. J.K. Furdyna (NotreDame, USA) and has 8 introducing speakers: J.Sadowski (Copenhagen), W. Walukiewicz (Berkeley), J. Masek (Prague), P. Kacman (Warsaw), M. Kamińska (Warsaw), M. Sawicki (Warsaw), H. Munekata (Tokyo), M. Tanaka (Tokyo). The lively discussion after invited talks and within the panel session pointed out the technological problems and scientific challenges on the way to synthesize the semiconductor compounds that can be ferromagnetic at the room temperature.

In 2003 the financial contribution of WP1 package to the Conference involved the technical support and travel expenses of one of the invited speakers.

The conference Proceedings (28 selected oral and poster contributions and 6 invited talks) were published in 2 numbers of Acta Physica Polonica. The list of this publications is given in the appendix 4.2 WP2 Workshop on Optical Properties of 2D systems with interacting carriers - starts in June 2004, as planned WP3 Workshop on Semimagnetic Semiconductors – Materials for Spintronics

The activity consists in the organisation of series of workshops on Semimagnetic (Diluted Magnetic) Semiconductors for 30-60 researches from Poland and abroad. The half of the participants will be the young researchers, working on their PhD thesis, the second half – recognized experts in the subject. The workshop consists of about 15 twenty-minutes presentations done by young persons followed by free discussion.

The round–table discussions of experts could be also organized. The workshop is organized in the response to rapid development in the area of semimagnetic semiconductors

based low-dimensional systems and important increasing number of young researchers and PhD students from Warsaw University, Polish Academy of Sciences, Warsaw Technical University involved in the experimental and theoretical studies of semimagnetic semiconductor low-dimensional structures. WP4. Enhancement of the PhD studies quality Within this workpackage four of our PhD students visited EU laboratories and performed an advanced experimental studies which will be a part of their PhD thesis. Because of complexity of the experimental research the need appeard for higher number and more long stays of our students in EU research centers. Therefore usually our PhD students were additionaly supported by our collaborators in EU and from other sources than WP4. WP5. Research feedback for development of spintronics materials Workpackage is devoted to the reseach and development on the suitable materials for spintronic devices and is closely related to the other european project FP5 grant no. G5RD-CT-2001-00535. A large majority of its activities will take place in year 2004. WP6. Research on optoelectronic application of nitride semiconductors Growth in MOCVD system and characterization of GaN and AlGaN has been realized in 2003. In particular the main effort has been put in reduction of threading dislocations in the grown layer. A new method of introduction of SiN interlayer inside of GaN layer has been found very effective. The reduction of density of threading dislocation by factor of 10 has been found. The other direction of research was connected with improvement of AlGaN epilayers suitable for solar blind detectors. Obtaining crack free layers and n-type doping of AlGaN layers with a high aluminum content have been one of ours goals.


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WP7 Strengthening of the Research Collaboration with Grenoble High Magnetic Field Laboratory According to the plan the activity of the Centre within WP7 has been devoted to the strengthening of the research

collaboration with Grenoble High Magnetic Field Laboratory. Due to scientific visits supported by the Centre we obtained substantial progress of the collaboration in comparison to the previous years:

1. Long term stay of Prof. Roman Stępniewski at Grenoble High Magnetic Field Laboratory (GHMFL), supported partially by the Centre, allowed for better examination of the experimental possibilities that can be realised within common projects.

2. Several common experiments in high magnetic fields have been performed in GHMFL with participation of the visitors from the Centre (prof. Roman Stępniewski, dr Andrzej Wysmołek, phd students: Barbara Chwalisz, Michał Szot, Agnieszka Wołoś).

3. There were two visits from GHMFL to the Centre. Dr Marek Potemski and dr Duncan Maude have presented their recent experimental results and discussed possible common activity.

4. During two visits of Prof. Marian Grynberg to GHMFL the problems related to transformation of the actual scientific collaboration into new organisation level of the regular partnership of the Poland in GHMFL have been discussed.

WP8 Twinning of the CEMOS with Laboratoire de Spectrometrie Physique in education and research concerning semiconductor materials and structures for optoelectronics and spintronics

The main target of the package is to improve the existing collaboration of both partner laboratories in the field of semiconductor materials and structures for optoelectronics and spintronics by widening the offer of specialised education for the students , creating conditions for extending the experience of the teaching staff and strengthening the research partnership. The visits performed within this workpackage enabled the exchange of scientific experiences, training in new experimental techniques, discussions of results and preparations to publishing.

WP 9 Co-ordination of the Centre (CEMOS) activities Coordination of the Center activities has been taken over by dr Jacek Przybytek, researcher managing the Center's activities. Because secretaries are not eligible for funding within this project, the secretariat of the Center has been run with financial support of Polish Comitee for Scientific Research. During the year 2003, 10 visits of european researchers to the center and 10 visits from the Center to EU laboratories/centers have been organized. We have organized 2 workshops and a special sesion during the Jaszowiec summer school. Unfortunatelly we have problems with inviting members of the international advisory comitee, because some of them were in Poland in 2003 in connection with other european projects. We plan these visits in the future.


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2. WORKPACKAGES PROGRESS REPORT 2.1 WORKPACKAGE No1

Work package title: Semiconductors in optoelectronics and spintronics - a special session during the Jaszowiec summer school Type of activity: CF WP Leader: dr A. Golnik, prof. J. M. Baranowski, prof. A.Twardowski Relative start month: 6 Timetable: 1 day-long sessions during the Jaszowiec summer school every year

Objectives and planned actions:

A special session during the Jaszowiec summer school was organised, which was devoted to physics and applications of optoelectronic and spintronic materials in order to built strength and scientific capacity of CEMOS.

The session called "Semiconductors in spintronics and optoelectronics" was organized on 3.06.2003. 13 papers from this special session day were published in the conference proceedings placed in two numbers of Acta Physica Polonica (are listed below). The session day involved 3 invited lectures, a panel discussion, 6 oral contribution and a poster session with 36 posters accepted. The panel discussion entitled "Ferromagnetic Semiconductors" moderated by prof. J.K. Furdyna had 8 introducing speakers and a discussion part. The time table of a special session day can be found within a schedule of the conference included in the Annex 4.1.

Problems encountered No problems encountered Publications and Papers

1. Magnetic and Transport Properties of (III,Mn)V Ferromagnetic Semiconductors, T. Jungwirth, J. Sinova and A.H. MacDonald, Acta Physica Polonica A 104 (2003) 103

2. Mn Impurity in GaN Studied by Electron Paramagnetic Resonance, Wołoś, M. Palczewska, Z. Wilamowski, M. Kamińska, A. Twardowski, M. Boćkowski, I. Grzegory and S. Porowski, Acta Physica Polonica A 103 (2003) 595

3. Observation of Vacancies in Ga1-xMnxAs with Positron Annihilation Spectroscopy, F. Tuomisto, J. Slotte, K. Saarinen and J. Sadowski, Acta Physica Polonica A 103 (2003) 601

4. Magnetic Resonance Studies of the Origin of Ferromagnetism in Ga1-xMnxAs, O.M. Fedorych, Z. Wilamowski, M. Potemski, M. Byszewski and J. Sadowski, Acta Physica Polonica A 103 (2003) 607

5. Magnetic Properties of GaMnAs Single Layers and GaInMnAs Superlattices Investigated at Low Temperature and High Magnetic Field, C. Hernandez, F. Terki, S. Charar, J. Sadowski, D. Maude, V. Stanciu and P. Svedlindh, Acta Physica Polonica A 103 (2003) 613

6. Interlayer Coupling in EuS-Based Superlattices (Dependence on the Energy Structure of Non-Magnetic Layer), P. Sankowski and P. Kacman , Acta Physica Polonica A 103 (2003) 621

7. Vertical Electron Transport through PbS--EuS Structures, S. Wrotek, K. Dybko, A. Morawski, A. Mąkosa, T. Wosiński, T. Figielski, Z. Tkaczyk, E. Łusakowska, T. Story, A.Yu. Sipatov, A. Szczerbakow , K. Grasza, J. Wróbel and W. Palosz, Acta Physica Polonica A 103 (2003) 629

8. Formation of Mn-Related Defect Band in InP, B. Macieja, K.P. Korona, M. Piersa, A.M. Witowski, D. Wasik, A. Wysmołek, G. Strzelecka, A. Hruban, B. Surma, M. Palczewska, M. Kamińska and A. Twardowski, Acta Physica Polonica A 103 (2003) 637

9. Spin Dependent Interactions of Free Carriers and Manganese Ions in Nanostructures of Wide Band Gap II--Mn--VI Semiconductors -- Mechanism of Lifetime Reduction, S. Yatsunenko, A. Khachapuridze, V.Yu. Ivanov, M. Godlewski, Le Van Khoi, Z. Gołacki, G. Karczewski, E.M. Goldys, M. Phillips, P.J. Klar and W. Heimbrodt, Acta Physica Polonica A 103 (2003) 643

10. Topographical, Magnetic and Optical Studies of (II,Mn)VI Quantum Structures Grown on (Ga,Mn)As, R. Butkute, M. Aleszkiewicz, E. Janik, G. Cywiński, P. Wojnar, L. Däweritz, J.-L. Primus, J. De Boeck and J. Kossut, Acta Physica Polonica A 103 (2003) 649


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11. Distance Dependence of the Mn--Mn Exchange Interaction in IV--VI Semimagnetic Semiconductors, A.Łusakowski and M. Górska, Acta Physica Polonica A 103 (2003) 659

12. Observation of Magnetic Anisotropy in Bulk GaMnN:Mg Crystals, J. Gosk, M. Zając, M. Kamińska, A. Twardowski, I. Grzegory, M. Boćkowski and S. Porowski, Acta Physica Polonica A 103 (2003) 665

13. D'yakonov--Perel Spin Relaxation Suppressed by an Applied Magnetic Field, Z. Wilamowski and W. Jantsch, Acta Physica Polonica A 103 (2003) 671

2.2 WORKPACKAGE No 2 Workpackage title: Workshop on Optical Properties of 2D systems with interacting carriers. Type of activity: WS WP Leader: dr Piotr Kossacki Relative start month: 18 Timetable: 2 days long workshop in summer 2004 Objectives and planned actions: as planned in project

2.3 WORKPACKAGE No 3 Workpackage title: Workshop on Semimagnetic Semiconductors – Materials for Spintronics Type of activity: WS WP Leader: Prof. M. Nawrocki Relative start month: January 2003 Timetable: January 2003, February 2004, December 2004

Objectives and planned actions: Workshop on Semimagnetic (Diluted Magnetic) Semiconductors was organized 11 January 2003 for 60

researchers from Poland. The half of the participants were the young researchers, working on their PhD thesis, the second half – recognised experts in the subject. Fourteen 20 min. papers were presented by young persons and after any paper the free discussion was opened. The booklet with abstracts for participants was prepared.

Problems encountered Because of the delay in the “CEMOS” project activation the workshop was organized without the

participation of experts from abroad and was financed using Warsaw University and Polish Academy of Sciences founds only.


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2.4 WORKPACKAGE No 4 Workpackage title: Enhancement of the PhD studies quality Type of activity : V1, V2, VR WP Leader: M. Kamińska Relative start month: 0 Timetable: 0-36 V2 Jan Suffczyński, Warsaw → Grenoble, France 04.02.03-07.05.03 Stay at the Université Joseph Fourier, Grenoble, France Supervisor of Jan’s stay at the Université Joseph Fourier, Grenoble was professor J. P. Poizat from Laboratoire de Spectrométrie Physique. The goal of experimental activities was observation of temporal and polarization correlation (antibunching, entanglement) between single photons coming from single quantum dot (QD). Microluminescence experiment on CdSe/ZnSe QD was performed at low (5K) temperature in order to find strong and spectrally separated emission from a single QD. Preparation of single photon correlation experiment was done with use of typical Hanbury-Brown and Twiss setup. It involved choice of optimal experimental conditions (voltage on photomultipliers (PM), parameters of the Single Photon Counting Card), selection of two most reliable PM from disposable ones and coupling of the Ti:SAP laser beam with optical fiber. The obtained results were presented in a poster form on the meeting Horizons’03 in Toulouse in September 2003 (Title: Boite Quantique Comme Source de Photons Uniques, Christophe COUTEAU, Sebastian MOEHL, Frank TINJOD, Jan SUFFCZYNSKI, Robert ROMESTAIN, Jean-Claude VIAL, Kuntheak KHENGet Jean-Philippe POIZAT).

V2 Paulina Płochocka, Warsaw → Madrid, Spain 12.04.03-18.05.03 Stay at the University of Madrid, Spain During her stay at University of Madrid Paulina worked in a group of Prof. Luis Viňa. She was involved in the investigation of dynamics of semiconductors. The experimental work was focused on measurements of time resolved photoluminescence of modulation doped (Cd,Mn)Te quantum well. The experiments were performed for different hole gas concentrations, for different excitation energies and excitation powers. The aim of this work was to determine the temperature of the photo-created plasma and also to investigate the interaction between preexisting and photo-created carriers. The main result was the observation that presence of carriers significantly affects the shape of the exciton transition line. Part of Paulina’s work was concerned on the interpretation of the experimental data obtained in Warsaw, where time resolved absorption was measured in pump-probe experiment. The interpretation and analysis was greatly enriched during discussions with Prof. Luis Viňa. V2 Michał Szot, Warsaw → Grenoble, France 08.06.03-27.06.03 Stay at Grenoble High Magnetic Field Laboratory (GHMFL, France) The main goal of the stay in GHMFL (Grenoble) was to carry out magnetophotoconductivity measurements on CdTe/CdMgTe quantum wells deposited on semi-insulating GaAs in a wide range of magnetic fields and for far-infrared excitation energies. We started similar experiments in Poland some years ago but the stay in Grenoble allowed to continue these experiments in much higher magnetic field. The samples measured were homogeneously doped with Iodine both in the well and in the barriers. These experiments were carried out in Poland at liquid helium temperatures as a function of magnetic field (up to 9 T), using different lines of FIR laser. As a result we could observe resonances, which occurred at the same magnetic fields for all used FIR laser excitation energies. We attributed the presence of these lines to the quasi-continuum of shallow donor transitions and to the localization of electrons on potential fluctuations. In our model these fluctuations originated from all ionised donors in the measured structure, as well as from surface states, but localization of electrons took place in the quantum well only. The characteristic spatial dimensions of fluctuations could be determined from measurements of cyclotron radius. These results and their interpretation were presented on 26th International Conference on the Physics of Semiconductors and 10 th International Conference on Shallow-Level Centres in Semiconductors [1, 2]. The experiment was continued at GHMFL. However, it was not finished, because of problems with the FIR laser. Additionally, during the stay in GHMFL, photoconductivity and transmission measurements of CdTe/CdMgTe quantum wells were performed, using Fourier spectrometer. The most important result was the observation of a line with energy of about 200 cm-1 for the single quantum well sample in both types of experiments. Energy position of this line was in the range of shallow donor transitions in this sample and did not depend on the magnitude of the applied magnetic field. We would like to continue the experiments with Fourier spectrometer, since the results are not clear for interpretation yet. 1. M. Szot, K. Karpierz, J. Kossut and M. Grynberg Proc. 26 th Int. Conf. Phys. Semicond., Edinburgh 2002, pp D831-D837, IOP Publishing, 2003 2. M. Szot, K. Karpierz, J. Kossut and M. Grynberg, Physica Status Solidi C, No 2, pp 609-612, 2003


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V2 Marta Gryglas, Warsaw → Marcoussis, France 30.11.03-23.12.03 Stay at Laboratoire de Photonique et Nanostructures (CNRS) in Marcoussis, France. During the stay in Laboratoire de Photonique et Nanostructures (CNRS) in Marcoussis (30 November –23 December) Marta performed a part of the measurements for her PhD thesis. She investigated the tunnelling process via single impurities in GaAs/AlAs/GaAs hetersotructure δ-doped with silicon in the centre. The main aim was to examine the properties of a new wafer that was recently processed and was expected to have a small number of impurities inside the junctions. The other aim was to discuss the results already obtained. Marta performed I-V characteristics at very low, 30mK temperatures and in magnetic field. She observed features related to resonant tunnelling via donors in I-V curves and resolved Landau quantisation in the magnetic field. She had also a nice opportunity to discuss her results with dr G.Faini, dr B.Jouault, prof. M. Dyakonov, known specialists in the field.

2.5 WORKPACKAGE No 5 Workpackage title: Research feedback for development of spintronics materials Type of activity : WS, V1, V2, VR WP Leader: prof. A. Twardowski Relative start month1: 0 Timetable: 36 V1 J.-L.Coutaz (Chambery, France) & A.Krotkus (Vilnius, Lithuania)

→Warsaw 26.09.2003 -30.09.2003

In September 2003 CEMOS was visited for few days by Professor Jean-Louis.Coutaz (University of Savoie, Chambery, France) and Professor Arounas Krotkus (Semiconductor Physics Institute, Vilnius, Lithuania) for consultations concerning new semiconductor composite materials, which could be used for applications in modern electronics. Discussions with groups of Professor M.Kaminska and Professor A.Twardowski were focused on systems exhibiting broad, ramp-like absorption edge, suitable for solar cells and systems with very short carrier lifetime, which could be used in fast electronic devices. Possible collaborative actions were discussed and planned.

2.6 WORKPACKAGE No 6 Workpackage title: Research on optoelectronic application of nitride semiconductors Type of activity : CO,WS,V1 WP Leader: prof. J.Baranowski Relative start month: 0 Timetable: 36 months

Objectives and planned actions: One day workshop has been organized on 18th September in Warsaw for about 30 participants. The title of workshop was “Nitride Growth and Applications”. There was seven invited talks, four connected with progress in nitride technology and three connected with devices. Talks about technology had been given by M.Heuken from Aixtron AG (Recent progress in GaN Technology”), by A.Strittmatter from Technische Universitat Berlin (“Benfits of opticl in-situ measurements for the MOCVD of III-Nitrides”), E.Dumiszewska from Institute of Electronic Materials Technology (‘Growth of AlGaN on sapphire substrates”) and K.Pakula from Institute of Experimental Physics Warsaw University (“Growth of nitrides with reduced dislocation density using SiN interlayer”). Talks about devices had been given by P.Prystawko from High Pressure Research Center Unipress Polish Academy of Sciences (“Violet laser diode on bulk substrate”), K.Kopczyński from Military University of Technology (“Application of UV detectors”) and L.Dobrzański from Institute of Electronic Materials Technology (“UV Solar blind detectors”) The workshop was organized during European Materials Research Society Meeting in Warsaw. Therefore some of participants of EMRS could participate in the workshop. It help also to lower cost of organization of the workshop (about 2030 EURO)


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In the first year of our activities our workshop was rather small and limited to one day meeting. This was connected with idea of saving some money for the 2004 year. In the 2004 we plan to organize much larger workshop of title: “Science and Technology of Nitrides and Related Materials”. This workshop will last four days and will be organized as one of symposium at autumn European Material Research Society meeting in September 2004. We expect participation of about 100 – 150 participants and about 12 invited speakers. Papers presented at the symposium will be published in Phys. Status Solidi. In addition to organization of the workshop one visit of scientist from University of Bremen, Germany, prof. D.Hommel was realized. He gave seminar and participated in discussion with our group.

2.7 WORKPACKAGE No 7 Work package title: Strengthening of the Research Collaboration with Grenoble High Magnetic Field Laboratory WP Leader: Prof. M. Grynberg Type of activity : V1,V2, VR Relative start month: 0 Timetable: 36 months

VR Prof. Roman Stępniewski, Warsaw →Grenoble, France 01.03. - 30.09.2003

Prof. Roman Stępniewski spent 7 months in Grenoble High Magnetic Field Laboratory (GHMFL). This long term stay has been partially supported from the Centre resources (travels). During his stay he was involved in the spectroscopic studies of the semiconductors in high magnetic fields. He was in permanent contact with dr. M. Sadowski, dr. A. Babinski and M. Byszewski discussing their actual experimental results. This experience allows for better examination of the experimental possibilities that can be realised within common projects. He took part in the experimental studies of ZnO and GaN performed in collaboration with dr Marek Potemski and visitors from the Centre: dr A. Wysmołek, and Barbara Chwalisz. He was involved in luminescence studies of the p-type GaAs/GaAlAs heterojunctions realised by dr. L.Bryja from Institute of Physics, Wrocław University of Technology, and luminescence of electron irradiated diamond and SiC realised by dr. J.Hayes from Department of Physics, University of Bristol. He gave the seminar devoted to the experimental results received within common studies of the shallow impurities in GaN. He presented the invited talk entitled: “Electronic structure of shallow impurities in GaN studied via bound exciton magnetooptics” during the European Materials Research Society Fall Meeting 2003, that had place in Poland, in Warsaw at 14-19 September 2003. Afterwards, this work was published in physica status solidi (a)

VR Barbara Chwalisz, Warsaw →Grenoble, France 17.08. – 13.09.2003

Barbara Chwalisz, during her one month stay in Grenoble High Magnetic Field Laboratory has performed number of magneto-optical experiments in high magnetic field. She was working with GaN/AlGaN structures grown on GaN buffer layer with SiN spacer, covered by metallic mask with 3-10µm mesas. It is expected that in such structure nano-objects, quantum dots (QDs) like, are formed. The photoluminescence spectra from such structures show interesting emission in the shape of sharp lines, similar to the luminescence that is expected for single QD. The purpose of the work of Barbara Chwalisz was to find the evolution in magnetic field of the single luminescence line, what would give information about the electronic states involved in the recombination process. The work with the structures covered with mask has a disadvantage that is difficult to illuminate with the exciting laser beam in several micrometer mesa. The experiment performed by Barbara Chwalisz let to determine the problems that appeared during the experiment and allowed for the development of new experimental techniques that would solve them in the future. The new experimental tools were built, but still more trials are needed. Apart from the laboratory work Barbara Chwalisz has prepared the material for the E-MRS conference that had place in Poland, in Warsaw at 14-19 September 2003. Her oral presentation entitled: “Optical Detection of 2DEG in GaN/AlGaN Structures – High Magnetic Field Studies” concerned her previous work performed in the cooperation between the groups from Warsaw University, Division of Solid State Physics and Grenoble High Magnetic Field Laboratory. Afterwards, this work was published in physica status solidi (c)

V1 Dr. Marek Potemski, Grenoble, France → Warsaw 05.11. - 09.11.2003

Dr. Marek Potemski during his stay in the Centre gave a seminar on “Microwave induced oscillations in the


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longitudinal and transverse resistance of a 2DEG”. He discussed with prof. Roman Stępniewski, dr Andrzej Wysmołek, Barbara Chwalisz and Katarzyna Surowiecka recent experimental results. Photoluminescence measurements on GaAs/AlAs quantum wells under applied electric field (performed in the Centre) have been analyzed, in the context of the future high magnetic field experiments. The interpretation of the two-electron satellite magnetospectroscopy of donor bound excitons in GaN has been discussed in the context of the paper prepared for the publication.

V1 Dr Duncan Maude, Grenoble, France → Warsaw 03.12. - 06.12.2003

During his stay in the Centre Dr Duncan Maude from High Magnetic Field Laboratory Grenoble gave a seminar on “Resistively Detected Nuclear Magnetic Resonance in the Quantum Hall Regime: Possible Evidence for A Skyrme Crystal Near Filling Factor v=1”. He visited laboratories in the Centre examining their possibilities and experimental results received recently. He discussed with dr. Karpierz and Michał Szot the future Far Infrared magnetooptical experiments, which will be performed in GHMFL.


• In the frame of WP7 several novel targets for future magnetooptical experiments have been identified. These include photoluminecent studies of the low dimensional systems based on GaN/AlGaN semiconductor structures, Far Infrared magnetospectroscopy of n-type doped CdTe/CdMgTe quantum wells, and microluminescence in high magnetic field.

• The technology of the quantum boxes growth, newly developed in the Centre for the GaN/AlGaN system, has been chosen to use for the preparation of samples for new common investigations in high magnetic field.

• The set of GaN/GaAlN quantum boxes structures of desired properties has been grown and initially characterised in the Center.

• Preliminary photoluminescence experiments of GaN/GaAlN quantum boxes structures and selection of samples for experiments in high magnetic fields have been done.

• The ability of the optical systems used in GHMFL has been tested in order to establish the experimental possibilities of the magnetooptical experiments for the GaN/GaAlN quantum boxes structures.

• Several common measurements with use of high magnetic fields in Grenoble High Magnetic Field Laboratory heave been performed with participation of the visitors from the Centre (prof. Roman Stępniewski, dr Andrzej Wysmołek, phd students: Barbara Chwalisz, Michał Szot, Agnieszka Wołoś). Only some of them (prof. Roman Stępniewski and Barbara Chwalisz) have been supported within WP7.

• Determination of the Centre role within the Polish contribution to the European High Magnetic Field Laboratory in Grenoble has been discussed during the Prof. M Grynberg visits in GHMFL (not supported within WP7)

Problems encountered The main goal of the WP7 is to increase the common scientific collaboration of the Centre and GHMFL. This activity is also supported from other resources (individual grants, national Polish and French funds). But typically, the financial incomes that can be used from such additional sources are not sufficient for the optimal using. This generates a need to have a possibility to join funds from different resources for realisation of a given task. On the other hand, according to the actual Polish financial rules the upper limits that could be spent for the local expenses in France is below the planned costs. So, the actual cost of a given action is smaller than supposed to be according to the initial estimation. Therefore, there is a need to use the resources assigned to the Centre within WP7 in a more flexible way, slightly different than originally planed. In particular, there is a need for few visits in order to perform measurements with use of high magnetic fields in Grenoble High Magnetic Field Laboratory. In these cases, the major part of the costs can be cover from other funds. However, these funds are too small to cover the optimal period of such visit. So, relatively small, support, within WP7, for these visits is required.


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Publications and Papers

R. Stępniewski, A. Wysmołek, and M. Potemski „Electronic structure of shallow impurities in GaN studied via bound exciton magnetooptics” phys. stat. sol. (a), 201, No. 2, 181–189 (2004)

B. Chwalisz, A. Wysmołek, R. Stępniewski, M. Potemski, W. Knap, J.M.Baranowski, N.Grandjean, J. Massies, P. Prystawko, I. Grzegory „Optical Detection of 2DEG in GaN/AlGaN Structures High Magnetic Field Studies” phys. stat. sol. (c) 1, 193 (2004)

2.8 WORKPACKAGE No 8 Workpackage title: Twinning of the CEMOS with Laboratoire de Spectrometrie Physique in education and

research concerning semiconductor materials and structures for optoelectronics and spintronics WP Leader: prof. J. Gaj Type of activity : V1,V2, VR Relative start month: 0 Timetable: 36 months

Visits

V1 Prof. Jean-Philippe Poizat Grenoble → Warsaw 16.01.2003 - 22.01.2003

V1 Prof. David Ferrand Grenoble → Warsaw 26.04.2003 - 03.05.2003

V1 Assist. Prof. Piotr Kossacki Warsaw → Grenoble 12.05.2003 - 24.05.2003

V1 Prof. Jan Gaj Warsaw → Grenoble 21.06.2003 -05.07.2003

V1 Assoc. Prof. Piotr Kossacki Warsaw → Grenoble 01.09.2003-30.09.2003

V2 Arkadiusz Kudelski Warsaw → Grenoble 30.09.2003-29.10.2003


The main target of the package is to improve the existing collaboration of both partner laboratories in the field of semiconductor materials and structures for optoelectronics and spintronics by

1. Widening the offer of specialised education for the students We contributed to the achievement of this goal by enabling two Warsaw students: Jan Suffczyński and Arkadiusz Kudelski to perform visits in the Laboratoire de Spectrometrie Physique (LSP). The visit of Jan Suffczyński was financed from WP4 while Arkadiusz Kudelski performed a one month visit financed by this workpackage. They were able to profit from the specialized traning by LSP experts: Jean Philippe Poizat, Joel Cibert and David Ferrand. Their training covered the field of photon emission from self organized quantum dots (J-P. Poizat) and optical studies of new spintronics materials (D. Ferrand) as well as of spin-dependent properties of doped semiconductor quantum wells (J. Cibert). Warsaw students profited also from the courses given by LSP experts during their short visits at Warsaw University: by D. Ferrand on magnetooptical studies of ZnCoO and by J-P. Poizat on applications of single photon emitters in quantum cryptography. LSP student profited from visits of Warsaw experts in Grenoble. P. Kossacki worked with the LSP student H. Boukari on the interpretation of the experimental results of spin-dependent effects in photoluminescence measured on p-doped CdMnTe quantum wells while J. Gaj worked with LSP student C. Couteau on optical properties of CdTe/ZnTe and CdSe/ZnSe self assembled quantum dot systems. J. Gaj participated also in the jury of the doctoral thesis of H. Boukari.

2. Creating conditions for extending the experience of the teaching staff The visits of the two Warsaw experts in Grenoble and two LSP experts in Warsaw (as mentioned above) allowed them to widen their teaching experience.


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3. Strengthening the research partnership § Exchange of information, discussing results of measurements and writing common papers During visits of P. Kossacki and J. Gaj in Grenoble a significant progress in creating common papers was achieved. Results obtained in Warsaw by ultrafast pump-probe spectroscopic technique on doped quantum wells grown in Grenoble were discussed with J. Cibert and S. Tatarenko and two common papers have been discussed and corrected. One (by P. Płochocka et al.) has been published electronically as a cond-mat preprint while being sent to an international journal for publication. The second one has been presented by P. Płochocka at an international conference in Modena, Italy, and accepted for the publication in the conference proceedings. The essential part of another common paper on spin-dependent photoluminescence has been prepared by P. Kossacki in collaboration with H. Boukari, J. Cibert and S. Tatarenko during the visit of P. Kossacki at Grenoble. The paper will be soon submitted for publication. Two papers have been written by J. Gaj during his visit in Grenoble: one on localization in doped quantum wells (by J. Gaj et al.) and one on in-plane anisotropy of CdMnT quantum wells tuned by magnetic field (A. Kudelski et al.). Both papers have been presented at an international conference in Niagara Falls, USA, and accepted for publication in the conference proceedings. § Examining possibilities of using equipment available in the partner laboratories for common investigations and performing preliminary measurements. Visits of J. Suffczynski and J. Gaj in Grenoble and of J-P. Poizat in Warsaw helped to transfer the experience in single photon correlation measurements of the LSP team to Warsaw laboratory, where a new experimental setup is under construction. An exchange of the quantum dot samples has been initiated, which will contribute to widening of the scope of different quantum dot systems studied in each laboratory by single photon emission techniques.

4. Exchange of students at graduate and doctoral level:Warsaw - Grenoble - three visits of at least one month per year This part has been realized partially because of not sufficient financial support planned in the final version of WP8, where no support of student visits has been predicted. As described above, two visits of Warsaw students in Grenoble were performed. One student visit has been financed at the expense of the expert exchange and one student visit from WP4 as planned. Grenoble → Warsaw – one visit of at least one month per year For the same reason, a visit of H. Boukari in Warsaw had to be financed from a different source (Marie Curie training program).

5. Exchange of senior specialists for teaching and research Warsaw - Grenoble – 1-2 short visits (1-2 weeks) and one long visit (1 month) per yearGrenoble - Warsaw – one short visit (1-2 weeks) per year This part has been realized approximately in the extent planned: two short visits of LSP experts in Warsaw as well as two short visits and one long visit of Warsaw experts in Grenoble, as described in detail above.

Deliverables, expected results, milestone for the overall package:

D8.1 Common publications in international scientific periodicals; delivering date1: months 12 – 36 Several paper prepared as described above will appear in the planned period.

D8.2 Presentation of common work at international conferences; delivering date1: months 12 – 36 Six presentations ahead of schedule: one at Modena, Italy, two at Niagara Falls, USA, and two oral presentations at Jaszowiec, Poland: by P. Płochocka et al. and W. Pacuski et al., as well as a poster presentation by J. Kasprzak et al.

D8.3 Visits of scPL in Grenoble and scEU in CoE: total ca 3 visits per year Due to a preference for short visits and a shift from expert to student exchange, six visits were realized in 2003

D8.4 Yearly reports of twinnig progress; delivering date1: months 14, 26 and 38 First report delivered as planned

Problems encountered A difficulty in financing the student exchange arose because in the final version of the contract the predicted student exchange financing was limited as compared to original application. A shift in the financing agreed with the program manager allowed us to obtain a better equilibrium between the student and expert exchange. Publications and Papers 1. Control of magnetic properties in (Cd,Mn)Te quantum wells inserted in pin diodes JOURNAL OF SUPERCONDUCTIVITY 16 Nr 1 2003, pp. 163-166


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H Boukari, M Bertolini, D Ferrand, J Cibert, S Tatarenko, J Wróbel, M Sawicki, Piotr Kossacki, A Wasiela, Jan Gaj, Tomasz Dietl 2. New structures for carrier-controlled ferromagnetism in Cd1-xMnxTe quantum wells JOURNAL OF CRYSTAL GROWTH 251 Nr 1-4, 2003, pp. 342-346 Michael Bertolini, Wiktor Maślana, H Boukari, B Gilles, J Cibert, David Ferrand, S Tatarenko, Piotr Kossacki, Jan Gaj 3. Optical studies of charged excitons in II-VI semiconductor quantum wells JOURNAL OF PHYSICS-CONDENSED MATTER 15, 2003, pp. 471-493 Piotr Kossacki 4. p-type doping of II-VI heterostructures from surface states: Application to ferromagnetic Cd(1-x)Mn(x)Te quantum wells APPLIED PHYSICS LETTERS 82 Nr 12, 2003, pp. 1875-1877 Wiktor Maślana, Piotr Kossacki, M Bertolini, H Boukari, D Ferrand, S Tatarenko, Joel Cibert, Jan Gaj 5. Femtosecond study of the interplay between excitons, trions, and carriers in (Cd,Mn)Te quantum wells, cond-mat/0308237 P. Plochocka, P. Kossacki, W. Maslana, J. Cibert, S. Tatarenko, C. Radzewicz, J. A. Gaj

Several further publications prepared as described above will be listed in the next report after appearance in print. Conference presentations: 1. Magnetic field controlled in-plane optical anisotropy in parabolic (Cd,Mn,Mg)Te quantum wells, Int. Conf. II-VI Compounds, Niagara Falls 2003 A. Kudelski, K. Kowalik, J. Kasprzak, A. Golnik, J.A. Gaj, T. Wojtowicz and G. Cywiński

2. Localization of neutral and charged excitons in (Cd,Mn)Te quantum well: a microphotoluminescence study, Int. Conf. II-VI Compounds, Niagara Falls 2003 J. A. Gaj, A. Golnik, P. Kossacki, K. Kowalik, W. Maślana, M. Kutrowski, and T. Wojtowicz

3. Ferromagnetic phase in II-VI semiconductors controlled by carriers, Int. Conf. II-VI Compounds, Niagara Falls 2003 J. Cibert, H. Boukari, M. Bertolini, W.Pacuski, D. Ferrand, S. Tatarenko, P. Kossacki and J.A. Gaj

4. Intensity stealing in time-resolved absorption of doped CdMnTe quantum wells, Int School on Physics of Semiconductor Compounds, Jaszowiec 2003 P. Płochocka, P. Kossacki , W. Maślana, C. Radzewicz, J. Gaj, S. Tatarenko, and J. Cibert

5. Effect of screening on the excitonic absorption in the presence of free carriers in quantum wells, Int School on Physics of Semiconductor Compounds, Jaszowiec 2003 P. Kossacki, P. Plochocka, W. Bardyszewski, J. Cibert, S. Tatarenko

6. Control of magnetic ordering by strain in CdMnTe quantum wells, Int School on Physics of Semiconductor Compounds, Jaszowiec 2003 W. Pacuski, P. Kossacki, W. Maslana, J.A. Gaj, D. Ferrand, J. Cibert, M. Bertolini, S. Tatarenko

2.9 WORKPACKAGE No 9 Work package number and title: Co-ordination of the Centre (CEMOS) activities Type of activity: CO, V1, VR, other WP Leader: prof. M. Grynberg Relative start month: 0 Timetable: 36

Objectives and planned actions: Coordination of the Center activities has been taken over by dr Jacek Przybytek, researcher managing the Center's activities. Because secretaries are not eligible for funding within this project, the secretariat of the Center has been run with financial support of Polish Comitee for Scientific Research. During the year 2003, 10 visits of european researchers to the center and 10 visits from the Center to EU laboratories/centers have been organized. We have organized 2 workshops and a special sesion during the Jaszowiec summer school. Unfortunatelly we have problems with inviting members of the international advisory comitee, because some of them were in Poland in 2003 in connection with other european projects. We plan these visits in the future.


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3. UPDATED PLANNING SHEET

WP1: A special 1 day sessions during the XXXIII International School on the Physics of Semiconducting Compounds "Jaszowiec 2004" May 28 - June 4, 2004 and during 2005 Jaszowiec summer school will be organised. They will be devoted to physics and applications of optoelectronic and spintronic materials in order to built strength and scientific capacity of CEMOS.

It has been accepted by dr Gianpietro van de Goor to shift the economised financial support from 2003 (the travel expenses of only one invited speaker from EU were paid, instead of 3 planned, because the CELDIS Centre of Excellence was willing to pay for 10 EU invited speakers in last year of their activity) i.e. 2760.80 EUR to 2004 to cover the conference costs for our PhD students.

The rest of cost calculation for WP1 remains unchanged: Travel and Subsistence: Invited lecturers 3360 EUR per year, Other: Room renting (with equipment), workshop proceedings and copies of lecturers notes, technical assistance, website etc. 1000 EUR per year

WP2: The „Workshop on Optical Properties of 2D systems with interacting carriers” will be organized in Warsaw. It will be held in the period of 10 June - 13 June 2004. The program committee was established:

Israel Bar-Joseph (Izrael)

Jan Gaj (Poland)

Pawel Hawrylak (Canada)

Piotr Kossacki (Poland)

Jacek Kossut (Poland)

Marek Potemski (France)

Robert Suris (Russia)

Luis Vina (Spain)

Dmitri Yakovlev (Germany)

The committy has selected 20 invited speakers, which should cover the subject of workshop. The increase of number of proposed invited talks, is justified by broader range of interesting topics which are strongly related to the optical properties of 2D systems. Therefore we would like to use 6000EUR planned as honoraria for 6 speakers (in other costs) as travel/subsistance for additional invited speakers.

The special issue of Acta Physica Polonica has been reserved in order to publish workshop proceedings.

WP3: The next workshops will be organized in February 2004 and December 2004 according to the original project plan. WP6: Updated planning sheet for 2004 For the 2004 we plan two short visit European scientist in Poland and two visit of Polish scientist abroad Cost: 500Euro travel + 4 days x 110Euro=940Euro 4x940Euro = 3760 Euro Lectures for workshop – 8 invited speakers Cost: 8 x [500Euro + 5 x 110 Euro] = 8400 Euro Workshop proceedings (50 papers) Cost: 50 x 60 Euro = 3000 Euro Total cost: 15160 Euro Cost calculation for WP7: Strengthening of the Research Collaboration with Grenoble High Magnetic Field Laboratory Visits to the Centre: 5x (500 EUR+6*110 EUR)=5800 EUR


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Visits to GHMFL: 6x (500 EUR+6*110 EUR) + 2x (500 EUR+30*110 EUR)=14560 EUR. Financial support of the visits to GHMFL WP8: Shift 30% to the credit of the PhD student exchange.

WP9: We would like to change the calculation of the personnel costs planned in this workpackage, remaining within the total sum reserved in the contract per year (ie.6000€) but increasing the hourly rate to 10 €/hour (now it amounts 4 €/hour) and simultaneously decreasing hours on project to 600 per year (now 1500). The justification for this change is following: in the negotiation phase we would like to hire a secretary within this workpackage, as described in Annex 1 to the contract ("Description of work"). However, because the secretaries are not eligible for funding within this project (and now the administrative personnel is supported from other sources), we had changed the category of staff to work on the project for "researcher managing the Center's activities" instead of "secretary". Now we would like also to increase the hourly rate, which is more adequate for person with scientific qualifications in charge of the work of Center of Excellence. This will not change the total personnel costs of the project because the hours on project will decrease to 600 hours/year.


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4. ANNEXES

4.1 Conference and Workshop reports

WP 1 - Semiconductors in optoelectronics and spintronics - a special session during the:

XXXII International School on the Physics of Semiconducting Compounds, Jaszowiec 2003, 30.05-6.06.2003

Monday, June 2

INVITED TALKS

9:00 - 10:00 Jurgen Smet (Stuttgart) - Composite fermion model of the FQHE - the quasi-particle notion at its best

10:10 - 11:10 Tomasz Andrearczyk (Warsaw) - Quantum Hall ferromagnet in magnetically-doped quantum wells

11:40 - 12:40 Kimmo Saarinen (Helsinki) - Vacancy - impurity complexes in highly doped semiconductors: atomic structure and electrical properties

12:40 - 13:30 MONDAY POSTER SESSION - part one

MONDAY ORAL SESSION

19:00 - 19:20 A. Wojs, Kyung-Soo Yi, J.J. Quinn, - Pairing and condensation of Laughlin quasiparticles in fractional quantum Hall systems

19:20 - 19:40 T. Figielski, T. Wosinski, A. Morawski, O. Pelya, A. Makosa, J. Sadowski, W. Dobrowolski, J. Jagielski, J. Wrobel - Magnetotransport through nanoconstricion in ferromagnetic semiconductor (Ga,Mn)As

19:40 - 20:00 M. Gryglas, M. Baj, B. Jouault, B. Chenaud, G. Faini, A. Cavanna - Resonant tunnelling through a single impurity

20:15 - 20:35 G. Grabecki, J. Wrobel, K. Fronc, M. Aleszkiewicz, M. Guziewicz, E. Papis, E. Kaminska, A. Piotrowska, H. Shtrikman, T. Dietl - Unusual transport properties of a 2D electron gas in a magnetic field gradient

20:35 - 20:55 P. Utko, K. Gloos, J.B. Hansen, P.E. Lindelof - SAW-driven single electron transport through shallow-etched point contacts

20:55 - 21:15 K. Kowalik, A. Kudelski, A. Golnik, J.A. Gaj, G. Karczewski, J. Kossut - In-plane anisotropy of self-assembled CdTe/ZnTe quantum dots

21:15 - 22:30 MONDAY POSTER SESSION - part two

Tuesday, June 3 - special session day**

** Semiconductors in spintronics and optoelectronics – a special day partially sponsored by CEMOS

INVITED TALKS

9:00 - 10:00 Thomas Jungwirth (Praha) - Magneto-transport properties of (III,Mn)V ferromagnetic semiconductors

10:10 - 11:10 Hiro Munekata (Tokyo)- Various aspects of photomagnetic effects in III-V-based magnetic alloy semiconductors

11:40 - 12:40 Masaaki Tanaka (Tokyo) - Spin-dependent tunneling and transport in ferromagnetic III-V heterostructures

12:40 - 13:30 TUESDAY POSTER SESSION - part one

16:30 - 18:00 PANEL DISCUSSION - Ferromagnetic Semiconductors - J.K. Furdyna

TUESDAY ORAL SESSION

19:00 - 19:20 A. Wolos, M. Palczewska, Z. Wilamowski, M. Kaminska, A. Twardowski, M. Bockowski, I. Grzegory, S. Porowski - Mn impurity in GaN studied by Electron Paramagnetic Resonance


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19:20 - 19:40 A. Idziaszek, M. Sawicki, F. Matsukura, T. Dietl, G. Karczewski, G.M. Schott, C. Ruester, C. Gould, G. Schmidt, L.W. Molenkamp - Temperature and hole concentration dependence of in-plain magnetic anisotropy in (Ga,Mn)As

19:40 - 20:00 P. Boguslawski, M. Buongiorno Nardelli, J. Bernholc - Theory of magnetic properties of substitutional and interstitial Mn ions in GaMnAs

20:15 - 20:35 P. Plochocka, P. Kossacki, W. Maslana, J. Cibert, S. Tatarenko, C. Radzewicz, J.A. Gaj - Intensity stealing in time-resolved absorption of doped CdMnTe quantum well

20:35 - 20:55 P. Kossacki, P. Plochocka, W. Bardyszewski, J. Cibert, S. Tatarenko - Effect of screening on the excitonic absorption in the presence of free carriers in quantum wells

20:55 - 21:15 W. Pacuski, P. Kossacki, W. Maslana, J.A. Gaj, D. Ferrand, J. Cibert, M. Bertolini, S. Tatarenko - Control of magnetic ordering by strain in CdMnTe quantum wells

21:15 - 22:30 TUESDAY POSTER SESSION - part two

Wednesday, June 4

INVITED TALKS

9:00 - 10:00 Carlos Tejedor (Madrid) - Dynamical response of nanostructures in microcavities

10:10 - 11:10 Peter Christianen (Nijmegen) - Lateral motion of exciton complexes in semiconductor quantum wells

11:40 - 12:40 Scott A. Crooker (Los Alamos) - Toward engineered energy flows in semiconductor quantum dot assemblies and ultrafast coherent terahertz spectroscopy in high magnetic fields

Thursday, June 5

INVITED TALKS

9:30 - 10:30 Bruno Daudin (Grenoble) - GaN/AlN heterostructures: from quantum wells to quantum dots through control of elastic strain relaxation mechanisms

10:40 - 11:40 Ruediger Goldhahn (Ilmenau) - Dielectric function of nitride semiconductors - an unknown property

12:10 - 13:10 Aneta Drabinska (Warsaw) - Photo- and electroreflectance spectroscopy of low dimensional III-nitride structures

13:10 - 14:00 THURSDAY POSTER SESSION - part one

THURSDAY ORAL SESSION

19:00 - 19:20 S.P. Lepkowski, T. Suski, P. Perlin, T. Kitamura, Y. Ishida, H. Okumura, T. Onuma, T. Koida, S.F. Chichibu - Manifestation of nonlinear elastic properties of InGaN

19:20 - 19:40 A. Wysmolek, R. Stepniewski, M. Potemski, B. Chwalisz, K.P. Korona, J.M. Baranowski, D.C. Look, S.S. Park, K.Y. Lee - Resonant magnetopolaron effect on shallow donors in GaN

19:40 - 20:00 K.P. Korona, A. Drabinska, A. Trajnerowicz, R. Bozek, K. Pakula, J.M. Baranowski - Tuning of spectral sensitivity of AlGaN/GaN UV detector

20:15 - 20:35 G. Franssen, R. Bohdan, S. Lepkowski, W. Trzeciakowski, T. Suski, P. Perlin - Two methods of direct investigation of piezoelectric fields in InGaN/GaN quantum well light emitting diodes

20:35 - 20:55 R. Bozek, Pakula, J.M. Baranowski - Scanning Kelvin Force Microscopy characterisation of GaN (0001) epilayers grown on sapphire with Metal-Organic Vapour Phase Epitaxy (MOVPE)

20:55 - 21:15 F. Tuomisto, K. Saarinen, D.C. Look - Identification of the Zn vacancy as an important acceptor defect in ZnO

21:15 - 22:30 THURSDAY POSTER SESSION - part two

Friday, June 6

INVITED TALKS

9:00 - 10:00 Wolfgang Heiss (Linz) , R. Kirchschlager, G. Springholz - Magneto-optical properties of Eu chalcogenides

10:10 - 11:10 Jozef Barnas (Poznan) , R. Swirkowicz, J. Martinek, M. Wilczynski, V. Dugaev - Spin polarized transport through quantum dots: Coulomb blockade and Kondo effect


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11:40 - 12:40 Wladek Walukiewicz (Berkeley) - Group III-nitride alloys: from applications to basic science and back again

WP3: Program of the 8th Workshop on the Semimagnetic Semiconductors Physics held in Obory, January, 11, 2003, not supported by CEMOS - organization was possible thanks to financial support of Institute of Physics of the Polish Academy of Sciences (PAS) and Center of Excellence CELDIS (in Institute of Physics of PAS):

VIII Workshop on Semimagnetic Semiconductor Physics

January, 11, 2003 Obory

PROGRAM 9:00 Reception, coffee 9:25 Opening address: Witold Daniel Dobrowolski

Przewodniczenie sesji: Andrzej Witowski Page. 9:30 Jacek Kasprzak Polariton effects in II-VI semiconductor

microcavities I

10:00 Agnieszka Wołoś Optical properties of bulk GaN doped with Mn

II

10:20 Ewa Ilczuk Obtainig of the epitaxial layers of the II-VI materials in its hexagonal phase

III

10:40 Piotr Sankowski Spin correlations in superlattices EuS/YbSe and EuS/SrS

IV

11:00 Coffee brake Session chairman: Jacek Kossut

11:30 Iwona Kowalik Investigations of the photoemission in GaN/Mn structures

V

11:50 Alicja Idziaszek The influence of the thermal annealing on the magnetic properties of the (Ga,Mn)As ferromagnetic layers.

VI

12:10 Viktor Osinniy Electronic structure of the GaMnAs: thermoelectric measurements.

VII

12:30 Wiktor Maślana Time-resolved photoluminescence measurements of the Cd1-xMnxTe ferromagnetic quantum wells with high Mn content.

VIII

13:00 Lunch Session chairman: Andrzej Golnik

14:00 Mohsen Ghali Ultrafast spin dynamics in magnetic/non-magnetic heterostructure containing low excess of electrons

IX

14:20 Grzegorz Cywiński Local strain in quasi one-dimensional nanostructures obtained by growing on the multi quantum well structure.

X

14:40 Piotr Dziawa Growing and investigations of the bulk Zn1-x-

yBexMnySe magnetic crystals XI

15:00 Wojciech Pacuski Magnetic properties of the strained CdMnTe/CdMgTe quantum wells.

XII

15:30 Coffee brake Session chairman: Marek Godlewski

15:50 Paulina Płochocka Dynamics of the Neutral- and Charged Excitons in the Single Quantum Well.

XIII

16:20 Oleg Fedorych Magnetic Resonances in GaMnAs XIV 16:50 Closing address: Michał Nawrocki


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WP6 Programm of the workshop organized within the WP6


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4.2 Papers and Publications WP1 Acta Physica Polonica A Vol. 103 No 6 June 2003 Proceedings of the XXXII International School on

Physics of Semiconducting Compounds, Jaszowiec, Poland, May 30--June 6, 2003, Part I 1. Pairing and Condensation of Laughlin Quasiparticles in Fractional Quantum Hall Systems, A. Wójs, Kyung-

Soo Yi and J.J. Quinn, Acta Physica Polonica A 103 (2003) 517 2. Magnetotransport through Nanoconstriction in Ferromagnetic Semiconductor (Ga,Mn)As, T. Figielski, T.

Wosiński, O. Pelya, J. Sadowski, A. Morawski, A. Mąkosa, W. Dobrowolski, J. Jagielski and J. Wróbel, Acta Physica Polonica A 103 (2003) 525

3. An Improved 2.5 GHz Electron Pump: Single-Electron Transport through Shallow-Etched Point Contacts Driven by Surface Acoustic Waves, P. Utko, K. Gloos, J.B. Hansen and P.E. Lindelof, Acta Physica Polonica A 103 (2003) 533

4. Characterization of Self-Assembled CdTe/ZnTe Quantum Dots, K. Kowalik, A. Kudelski, A. Golnik, J.A. Gaj, G. Karczewski and J. Kossut, Acta Physica Polonica A 103 (2003) 539

5. Magnetoconductivity of GaAs Transistors as Detectors of THz Radiation, J. Łusakowski, W. Knap, E. Kamińska, A. Piotrowska and V. Gavrilenko, Acta Physica Polonica A 103 (2003) 545

6. Study of Tip-Induced Ti-Film Oxidation in Atomic Force Microscopy Contact and Non-Contact Mode, J. Soltys, V. Cambel and J. Fedor, Acta Physica Polonica A 103 (2003) 553

7. Microwave-Induced Delocalization of Excitons in Ternary Compounds of II--VI and III--V Semiconductors, V.Yu. Ivanov, M. Godlewski, A. Khachapuridze, S. Yatsunenko, T. Wojtowicz, G. Karczewski, J.P. Bergman, B. Monemar, T. Shamirzaev, K. Zhuravlev , K. Leonardi and D. Hommel, Acta Physica Polonica A 103 (2003) 559

8. Electron Pairs and Excitons in Quasi-One-Dimensional Nanostructures, S. Bednarek, B. Szafran, T. Chwiej and J. Adamowski, Acta Physica Polonica A 103 (2003) 567

9. Localization Effects in GaN/AlGaN Quantum Well -- Photoluminescence Studies, B. Chwalisz, A. Wysmołek, R. Bożek, K.P. Korona, R. Stępniewski, W. Knap , K. Pakuła, J.M. Baranowski, N. Grandjean, J. Massies, P. Prystawko and I. Grzegory, Acta Physica Polonica A 103 (2003) 573

10. Infrared Lateral Photoconductivity of InGaAs Quantum Dots: the Temperature Dependence, L.D. Moldavskaya, V.I. Shashkin, M.N. Drozdov, V.M. Daniltsev, A.V. Antonov and A.N. Yablonsky, Acta Physica Polonica A 103 (2003) 579

11. The Effect of Pressure and Temperature on AlGaInP and AlGaAs Laser Diodes, P. Adamiec, T. Świetlik, R. Bohdan, A. Bercha, F. Dybała and W. Trzeciakowski, Acta Physica Polonica A 103 (2003) 585

12. Mn Impurity in GaN Studied by Electron Paramagnetic Resonance, Wołoś, M. Palczewska, Z. Wilamowski, M. Kamińska, A. Twardowski, M. Boćkowski, I. Grzegory and S. Porowski, Acta Physica Polonica A 103 (2003) 595

13. Observation of Vacancies in Ga1-xMnxAs with Positron Annihilation Spectroscopy, F. Tuomisto, J. Slotte, K. Saarinen and J. Sadowski, Acta Physica Polonica A 103 (2003) 601

14. Magnetic Resonance Studies of the Origin of Ferromagnetism in Ga1-xMnxAs, O.M. Fedorych, Z. Wilamowski, M. Potemski, M. Byszewski and J. Sadowski, Acta Physica Polonica A 103 (2003) 607

15. Magnetic Properties of GaMnAs Single Layers and GaInMnAs Superlattices Investigated at Low Temperature and High Magnetic Field, C. Hernandez, F. Terki, S. Charar, J. Sadowski, D. Maude, V. Stanciu and P. Svedlindh, Acta Physica Polonica A 103 (2003) 613

16. Interlayer Coupling in EuS-Based Superlattices (Dependence on the Energy Structure of Non-Magnetic Layer), P. Sankowski and P. Kacman , Acta Physica Polonica A 103 (2003) 621

17. Vertical Electron Transport through PbS--EuS Structures, S. Wrotek, K. Dybko, A. Morawski, A. Mąkosa, T. Wosiński, T. Figielski, Z. Tkaczyk, E. Łusakowska, T. Story, A.Yu. Sipatov, A. Szczerbakow , K. Grasza, J. Wróbel and W. Palosz, Acta Physica Polonica A 103 (2003) 629

18. Formation of Mn-Related Defect Band in InP, B. Macieja, K.P. Korona, M. Piersa, A.M. Witowski, D. Wasik, A. Wysmołek, G. Strzelecka, A. Hruban, B. Surma, M. Palczewska, M. Kamińska and A. Twardowski, Acta Physica Polonica A 103 (2003) 637

19. Spin Dependent Interactions of Free Carriers and Manganese Ions in Nanostructures of Wide Band Gap II--Mn--VI Semiconductors -- Mechanism of Lifetime Reduction, S. Yatsunenko, A. Khachapuridze, V.Yu. Ivanov, M. Godlewski, Le Van Khoi, Z. Gołacki, G. Karczewski, E.M. Goldys, M. Phillips, P.J. Klar and W. Heimbrodt, Acta Physica Polonica A 103 (2003) 643

20. Topographical, Magnetic and Optical Studies of (II,Mn)VI Quantum Structures Grown on (Ga,Mn)As, R. Butkute, M. Aleszkiewicz, E. Janik, G. Cywiński, P. Wojnar, L. Däweritz, J.-L. Primus, J. De Boeck and J. Kossut, Acta Physica Polonica A 103 (2003) 649

21. Distance Dependence of the Mn--Mn Exchange Interaction in IV--VI Semimagnetic Semiconductors, A.Łusakowski and M. Górska, Acta Physica Polonica A 103 (2003) 659


21

22. Observation of Magnetic Anisotropy in Bulk GaMnN:Mg Crystals, J. Gosk, M. Zając, M. Kamińska, A. Twardowski, I. Grzegory, M. Boćkowski and S. Porowski, Acta Physica Polonica A 103 (2003) 665

23. D'yakonov--Perel Spin Relaxation Suppressed by an Applied Magnetic Field, Z. Wilamowski and W. Jantsch, Acta Physica Polonica A 103 (2003) 671

24. Tuning of Spectral Sensitivity of AlGaN/GaN UV Detector, K.P. Korona, A. Drabińska, A. Trajnerowicz, R. Bożek, K. Pakuła and J.M. Baranowski, Acta Physica Polonica A 103 (2003) 675

25. Magnesium Acceptor Energy Levels in Cubic GaN, H. Przybylińska, R. Buczko G. Kocher and W. Jantsch, Acta Physica Polonica A 103 (2003) 683

26. Cathodoluminescence Profiling of InGaN-Based Quantum Well Structures and Laser Diodes -- In-Plane Instabilities of Light Emission, M. Godlewski, V.Yu. Ivanov, E.M. Goldys, M. Phillips, T. Böttcher, S. Figge, D. Hommel, R. Czernecki, P. Prystawko, M. Leszczynski, P. Perlin, I. Grzegory and S. Porowski, Acta Physica Polonica A 103 (2003) 689

27. Role of Auger-Type Energy Transfer Processes in Quenching of Anti-Stokes Emission in Chromium and Iron Doped ZnSe: ODMR, Optical and Time-Resolved Study, V.Yu. Ivanov, G. Karczewski, M. Godlewski, A.R. Omel'chuk, A.E. Belyaev and N.V. Zhavoronkov, Acta Physica Polonica A 103 (2003) 695

28. Electronic Structure of ZnS:Co Semiconductors: X-ray and Optical Spectroscopy Studies, T.P. Surkova, V.R. Galakhov and M. Godlewski, Acta Physica Polonica A 103 (2003) 703

Acta Physica Polonica A Vol. 104 No 2 August 2003, Proceedings of the XXXII International School on Physics of Semiconducting Compounds, Jaszowiec, Poland, May 30--June 6, 2003, Part II 1. Quantum Hall Ferromagnet in Magnetically-Doped Quantum Wells, T. Andrearczyk, J. Jaroszyński, J.

Wróbel, G. Karczewski, T. Wojtowicz, E. Papis, E. Kamińska, A. Piotrowska, D. Popović and T. Dietl, Acta Physica Polonica A 104 (2003) 93

2. Magnetic and Transport Properties of (III,Mn)V Ferromagnetic Semiconductors, T. Jungwirth, J. Sinova and A.H. MacDonald, Acta Physica Polonica A 104 (2003) 103

3. Ultrafast Coherent Terahertz Spectroscopy in High Magnetic Fields and Directed Energy Flows in Quantum Dot Assemblies, S.A. Crooker, T. Barrick, J.A. Hollingsworth and V.I. Klimov, Acta Physica Polonica A 104 (2003) 113

4. Dielectric Function of Nitride Semiconductors: Recent Experimental Results, R. Goldhahn, Acta Physica Polonica A 104 (2003) 123

5. Photo- and Electroreflectance Spectroscopy of Low-Dimensional III-Nitride Structures, A. Drabińska, Acta Physica Polonica A 104 (2003) 149

6. Spin Polarized Transport through Quantum Dots: Coulomb Blockade and Kondo Effect, J. Barnaś, R. Świrkowicz, M. Wilczyński, I. Weymann, J. Martinek and V. Dugaev, Acta Physica Polonica A 104 (2003) 165

contract no g5ma-ct-2002-04062 first annual progress ...cemos/nas2_annual_periodic_report_2003.pdf1....

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