PHONONS 89

Heidelberg, 21-25 August 1989Federal Repubfic of Germany

Proceedings of theThird International Conference on

Phonon Physicsand the

^ Sixth International Conference onr Phonon Scattering

]} |\J *> Z1 / ': in Condensed Matter

Volume 2

Editors

S Hunklinger W Ludwig G Weiss

. UN!VERS!TA7SB!3U0THEKHANNOVER

TFZCHN13CHEI

World ScientificSingapore • New Jersey • London • Hong Kong

XX

Rigidity Percolation in Sei_xGex Glasses ^ 688J. Y. Duquesne and G. Bellessa

Fractons in Polymers: Comparative Study by Neutron andRaman Scattering 691

V.K. Malinovsky, V.N. Novikov, P.P. Parshin,A.P. Sokolov and M.G. Zemlyanov

Lattice Vibrations of the Diluted Two-Dimensional CooperativeJahn-Teller System K2CuaZn1..a;F4 694

/. Yamada, Y. Fukada and M. Totani

Neutron Scattering Results on the Density of States ofFractals 697

G. Coddens, J. Pelous, T. Woignier, R. Vacher,E. Courtens and J. Williams

VOLUME 2

Chapter 5: Phonons in Superlattices and Quantum Wells 701

Phonon Transmission through Periodic, Quasiperiodic andRandom Superlattices 703

S. Tamura

Confinement Effects on Free Carrier Scattering fromOptical Phonons in Semiconductor Quantum Wells 713

R. Haupt, L. Wendler, F. Fiedler and F. Bechstedt

Lattice Dynamics of GaSb/InAs Superlattices in aBond-Charge-Model Approach 716

L. Colombo and L. Miglio

Frequency Gaps in Acoustic Phonon Transmission in Periodic,Quasiperiodic and Real Superlattices for Normal Incidence 719

R. Hotz

Disorder Effects on the Phonon Spectra of UltrathinSemiconductor Superlattices: First Principles Results 722

S. Baroni, P. Giannozzi and E. Molinari

Relationship of Microscopic and Macroscopic Theories forOptical Phonons in GaAs-AlAs Superlattices 725

F. Bechstedt, H. Gerecke and L. Wendler

Theory of Phonon-Polariton Modes in Low Dimensional Structures 728N. Raj, D.R. Tilley, T. Dumelow and T.J. Parker

XXI

Angular Dependence of Acoustic Phonon Stop Bands in Periodicand Quasiperiodic a-Si:H/a-SiNx:H Superlattices 731

R. Hotz

Phonon Calculations in InAs/GaSb Heterostructures 734D. Berdekas and G. Kanellis

Generalized Continuum Approach to Phonon Modes inHeteroj unctions • 737

A. Greiner, G. Mahler, A. Kriman and D.K. Ferry

Confined Optical Modes in Si/Ge Strained Layer Superlattices 740E. Friess, K. Eberl, U. Menczigar and G. Abstreiter

Raman Scattering from Acoustic, Optical and InterfaceVibrational Modes in Strained Short-Period (001) Si/GeSuperlattices 743

W. Bacsa, M. Ospelt, H.v. Kdnel, P. Wachter

Phonons in Single Crystal Superlattice Family (GaAs)m(AlAs)n 746B.H. Bairamov, M. Delaney, R.A. Evarestov, T.A.Gant,Yu.E. Kitaev, M.V. Klein, D. Levi and H. Morkoc

Study of the Dielectric Response Functions of SuperlatticesUsing Raman and Far Infrared Spectroscopy 749

T. Dumelorv, A. Hamilton, T.J. Parker, B. Samson,S.R.P. Smith, D.R. Tilley, D. Hilton,K. Moore and C. T.B. Foxon

Effects of Acoustic and Optical Dampings on the LightScattering by Acoustic Phonons in Superlattices 752

J. He and J. Sapriel

Bandgaps in the Phonon Emission Spectra of MetallicSuperlattices 755

H. Waelzel, P. Berberich, J.M. Triscone and M.G. Karkut

Raman Scattering from a Coupled LO-Phonon -Hole-Intersubband Excitation in GaAs - Gao.57Alo.43AsMultiple Quantum Wells 758

M. Dahl, J. Kraus, B. Miller, G. Schaack andG. Weimann

Effects of Substrate Misorientation on the InterfaceBroadening of GaAs/Alo.3Gao.7As Superlattices 761

Y. Cheng, Y. Jin, X. Zhu and S.L. Zhang

XXII

Chapter 6: Electron-Phonon Interaction , 765

Electron-Phonon Interaction in Semiconductor Heterostructures 767W. Dietsche

Phono-Conduction Spectroscopy of Shallow Statesin Semiconductors 777

K. Lassmann, M. Gienger and P. Gross

Microscopic Theory of Intervalley Scattering in GaAs:

k -Dependence of Intervalley Deformation Potentials 787S. Zollner, S. Gopalan and M. Cardona

Phonon Scattering by Orthorhombically Distorted Jahn-TellerIons in III-V Semiconductors 790

L.J. Challis, B. Salce, N. Butler,M. Saharaoui-Tahar and W. Ulrici

Inelastic Light Scattering by Phonon and Free ElectronExcitations in Semiconductors with Nonparabolic Dispersionof Energy Bands 793

B.H. Bairamov, V.A. Voitenko, I.P. Ipatova and V. V. Toporov

Evidence for Strong Electron-Phonon Coupling in GaP:VJ.L. Dunn, C.A. Bates and W. Ulrici

Acoustic Properties of Disordered Interacting Electron System 799T.Sota and K.Suzuki

Point-Contact Spectroscopy of the Electron-PhononInteraction in (Lax-^Pr^jNis Compounds 802

P. Samuely, M. Reiffers, A.I. Akimenko,N.M. Ponomarenko and I.K. Yanson

High Resolution Study of Hot Hole MagnetophononResonance in p-InSb in High Magnetic Fields up to 40 T 805

TV. Kamata, K. Yamada, N. Miura

Microcontact Spectra of Electron-Phonon Interactionfor Metals 808

A.P. Zhernov and T.N. Kulagina

Generation of Transverse Phonons by Mode Conversionin Non-Equilibrium Metal Films 811

N. Perrin, M.N. Wybourne and J.K. Wigmore

Field Dependence of Sound Velocity in HeavyFermion Systems 814

R.J. Wojciechowski and L. Kowalewski

XXIII

Ultrashort Solitons in Coupled Electron-Phonon Systems " 817K. Hasenburg, G. Mahler and E. Sigmund

Ultrasonic Study of Magnetic Freeze-out in n-InSb atLow Temperatures 820

J.H. Page and F. Guillon

Effect of Optical Phonons on the Excitonic Self-Trapping Rate 823M. Schreiber and H.-J. Kmiecik

Influence of Correlations on Interacting Electron-PhononSystems 826

M. Schreiber and W. SchmidtAverage Electron-Phonon Interaction, (I2), for hep Metals 829

C.-G. Jiang, G. Fletcher and J.L. FryOn Phonon Scattering in NiPt Alloys 832

H. Litschel and I. Isarie

Electron-Phonon Interaction in NiTi 835M. Keil, M. Milliner and W. Weber

Chapter 7: Surface Phonons 839

Surface Dynamics and Surface Reconstruction 841F.W. de Wette, A.D. Kulkarni, U. Schroder,J. Prade, W. Kress

Microscopic Theory of Surface Phonons in Metals 851A.G. Eguiluz

Investigation of Surface Phonons by He Atom Scattering 861E. Hulpke

Inelastic Neutron Scattering from Adsorbates 871H.J. Lauter

Phonons of Thin Epitaxial Pb Films Grown on aCu(lll) Surface 880

C. Koziol, J.P. Toennies and G. Zhang

Oxygen Phases Chemisorbed on Ag(110) Studied by InelasticHe Atom Scattering 883

G. Bracco, P. Cantini, R. Tatarek and G. Vandoni

Interface Optical Phonons: A Non-Destructive andQuantitative Study by High Resolution Electron EnergyLoss Spectroscopy 886

P.A. Thiry, R. Sporken, J.J. Pireaux, R. Caudano,

XXIV

Ph. Lambin, J.P. Vigneron and A.A. Lucas -

Elastic and Inelastic He Atom Scattering on NaI(001)(110) 889J.G. Skofronick, G. Chern, W.P. Burg,J. Duan and S.A. Safron

Charge Density Wave Coupled Phonons on a lT-TaS(OOl)Single Crystal Surface Measured by He Atom Scattering 892

G. Brusdeylins, F. Hofmann, P. Ruggerone, J.P. Toennies,R. Vollmer, G. Benedek and J.G. Skofronick

Surface Phonon Dispersion Curves of Ionic InsulatorsMeasured by High Resolution Electron Energy Loss Spectroscopy 895

J.L. Longueville, P.A. Thiry, J.J. Pireaux and R.Caudano

Coherent Phonon Representation for He Metal SurfaceCollision Scattering 898

A. Khater

Lattice Dynamical Calculations for Stepped Surfaces 901A. Lock, J.P. Toennies and G. Witte

Direct Observation of Ripplons in 4He Films ByNeutron Scattering 904

H. Godfrin, V.L.P. Frank, H.J. Lauter and P. Leiderer

Lattice Dynamics Calculations on Adsorbed MolecularLayers with Large Amplitude Motions 907

T.H.M. van den Berg

V2O6 Covered with a V 6 Oi 3 Layer: A HREELS Investigation 910H. Poelman, J. Vennik and G. Dalmai

Phonon Gap Energy as a Function of Temperature forCommensurate Monolayers on Graphite 913

V.L.P. Frank, H.J. Lauter and P. Leiderer

Rotational Excitation and out-of-Plane Vibration ofpara-H2 and HD Adsorbed on Graphite 916

J.L. Armony, V.L.P. Frank, H.J. Lauter and P. Leiderer

Excitations in the Commensurate Phase of CD4Adsorbed on Graphite 919

T.Moller, H.J. Lauter, V.L.P. Frank and P. Leiderer

Lattice Dynamics of Nitrogen Adsorbed on Graphite Investigatedby Inelastic Neutron Scattering 922

V.L.P. Frank, H.J. Lauter, F. Y. Hansen,H. Tavb, L. W. Bruch and J.R. Dennison

XXV

Reflection of Terahertz-Phonons at Crystal Surfaces " 925U. Happek, R.O. Pohl and K.F. Renk

Experimental Measurements of 4He Solid LiquidInterface Inertia 928

J. Poitrenaud and P. Legros

Surface Phonons from Ab-Initio Molecular Dynamics:Si(lll) 2x1 931

F. Ancilotto, W. Andreoni, A. Selloni, R. Carand M. Parrinello

First-Principles Screening Calculation of the SurfacePhonon Dispersion Curves at the (100) Surface of Sodium 934

A.A. Quong, A.A. Maradudin, R.F. Wallis, J.A. Gasparand A.G. Eguiluz

Surface Phonons in GaAs (110) and Ge (ll l):2xl:A Bond Charge Model Calculation 937

P. Santini, L. Miglio, G. Benedek and P. Ruggerone

Stability of the bcc(OOl) Surfaces: A Comparison betweenMo(001) and Nb(001) 940

M. Huppauff, E. Hulpke and D.-M. Smilgies

Lattice Dynamics and Mean-Square Displacements at theReconstructed Si(001)-(2xl) Surface 943

A. Mazur and J. Pollmann

Surface Dynamics of SrTiO3 946J. Prade, U. Schroder, W. Kress,A.D. Kulkarni and F.W. de Wette

Interpretation of Features in the Surface VibrationalModes of KBr and RbBr 949

S.A. Safron, G. Chern, W.P. Burg and J.G. Skofronick

Vibrational Properties of the Non-Ideal AlAs/GaAs(001) Interface 952

D. Kechrakos and J.G. Inkson

Attenuation of Surface Acoustic Waves Due to CubicAnharmonicity 955

A.P. Mayer, X. Huang, A.A. Maradudin and R.F. Wallis

Correlated Detection of a-Particles on Si-Surfaces 958C. Hagen, W. Rothmund and A. Zehnder

XXVI

Study of Surface and Interface Phonons in GaAs/AlAsSuperlattices by Raman and Far Infrared Spectroscopy

T. Dumelow, A. Hamilton, T.J. Parker, B.Samson,S.R.P. Smith, D.R. Tilley, D. Hilton, K. Moore andC. T.B. Foxon

961

Chapter 8: Low Dimensional Systems 965

Phonon Emission and Scattering in a Two-DimensionalElectron Gas in Quantizing Magnetic Fields 967

L.J. Challis, A.J. Kent and V. W. RamptonComputer Simulation of Intrinsic Localized Vibrations inAnharmonic Chain 977

V.M. Burlakov, S.A. Kiselev and V.N. Pyrkov

Sandwich Phonons in bcc Crystals 980A. Jbara, A. Akjouj, B. Sylla and L. Dobrzynski

Frenkel-Kontorova Model with Long-Range InterparticleInteraction 983

O.M. Braun, Yu.S. Kivshar and I.I. Zelenskaya

The Effect of Periodic Surface Roughness on PhononDispersion in Narrow Wires 986

J. Seyler and M.N. Wybourne

On Temperature Behaviour of Elastic Properties of LayeredCrystals 989

N.I. Lebedev, A.S. Sigov

Thermalization of 2DEG in Quantum Well due to SpontaneousEmission of Acoustic Phonons 992

F. W. Sheard •

An Investigation of the Phonons Emitted by a Hot TwoDimensional Electron Gas (2DEG) in a GalliumArsenide/Aluminium Gallium Arsenide Heterojunction 995

A.J. Kent, P. Hawker, M. Henini, O.H. Hughes,L.J.Challis

The Interaction of 9.3GHz Ultrasonic Waves with the 2-DEGof a GaAs Heterojunction 998

P.J.A. Carter, V. W. Rampton, M.I. Newton,K. McEnaney, M.Henini and O.H.Hughes

XXVII

Zone Center Phonon Gap in the Commensurate Phase of3He Adsorbed on Graphite 1001

V.L.P. Frank, H.J. Lauter, H. Godfrin and P. Leiderer

Phonon Emission in the Quantum Hall Regime 1004F.F. Ouali, N.P. Hewett, P.A. Russell and L.J. Challis

Reflection of Phonons by the 2-DEG of a Si-MOSFET and aGaAs Heterojunction . 1007

V. W. Rampton, Y. bin Wahab, M.I. Newton,P.J.A. Carter, K.McEnaney, M.Henini and O.H.Hughes

The Spatial Anisotropy of the Phonon Emission by a HotTwo Dimensional Electron Gas (2DEG) in a Silicon Device ina Quantising Magnetic Field 1010

A.J. Kent, G.A. Hardy, P. Hawker D.C.Hurley

Phonon Scattering by 2D Electrons in GaAs/AlGaAsHeterostructures at High Magnetic Fields 1013

S. Tamura and H. Kitagawa

Chapter 9: Excitations in Quantum Matter 1017

Phonons, Rotons and Quantum Evaporation in Liquid 4He 1019A.F.G. Wyatt

Temperature Dependence of the Phonon-Roton Excitations inLiquid Helium-4 1029

H.R. Glyde and W.G. Stirling

Theory of Anomalous Phonon Dispersion in Liquid Helium 1032H.J. Maris

Finite Amplitude Acoustic Waves in Liquid He-3 and He-4 1035M. Chapellier, J. Joffrin, M. Meisel and A. Schuhl

Single- Multiphonon Scattering from a Local Mode of MolecularHydrogen in a Deuterium Matrix 1038

W. Lang el, E. Knozinger

Extendend Bogoliubov Theory for a Non-Ideal Bose Gas 1041P. Mulheran

Four Phonon Scattering in Liquid 4He 1044M.A.H. Tucker and A.F.G. Wyatt

Phonon-Roton Scattering in Liquid Helium 1047A.C. Forbes and A.F.G. Wyatt

xxviii

The Creation of R+rotons by Condensing 4He Atoms " 1050M. Brown and A.F.G. Wyatt

R+roton-Atom Evaporation Near the Critical Angle 1053M. Brown and A.F.G. Wyatt

The Injection of Large Wavevector Rotons into Liquid 4He 1056M. Brown and A.F.G. Wyatt

Chapter 10: Nonlinear Phenomena 1059

Dynamical Phonon Memory Effects and Phonon Super andSubprocesses 1061

U. Kopvillem

Propagation and Dephasing of Picosecond Phonon-PolaritonPulses in an Uniaxial Crystal: LiIO3 1071

F. ValUe, G.M. Gale and C. Flytzanis

Amplification of Rayleigh Sound Waves in Thin BismuthFilms at Low Temperatures 1074

C.-C. Wu and J. Tsai

Forced Standing Solitons and Chaos 1077R. Wei

Phonon-Enhanced Charge Transfer in II-IV Compounds 1080/. Terry, N. Bensaid, D.J. Meredith, J.K. Wigmoreand B. Lunn

Acoustic spectral Hole-Burning in Resonant Oscillators 1083F. Tsuruoka

Nonlinear Wavepacket Scattering in Disordered Systems 1086Yu.S. Kivshar

Phonon Backscattering by Normal Processes 1089G.Muller and O. Weis

Chapter 11: Phase Transitions 1093

Phonons at Martensitic Phase Transitions 1095W. Petry, A. Heiming, J. Trampenau, M. Alba,C. Herzig and H.R. Schober

Phonon Dispersion in /9-Phase Nickel-Aluminum Alloys 1108E.D. Hallman and E.C Svensson

XXIX

Elastic Anomalies in Fe3Pt Invar Alloys "• 1111U. Kawald, J. Pelzl, G.A. Saunders,P. Ngoepe and H. Radhi

Coupled Mode Scattering Processes at lq to 2q PhaseTransitions within Incommensurate Phases 1114

J.F. Scott and W.F. Oliver

Isotope Effects on Incommensurate Phase Transitions inRb2ZnCl4 and K2Se04 1117

T. Hidaka

Isotope Induced Phase Transitions in (ND4)2TeCl6 11205. Muller, U. Kawald and J. Pelzl

Dielectric Relaxation in Sr^Bai-^NbaOe (SBN) 1123G. Schmidt and H. Arndt

Elastic Investigations of K2Ba(NO2)4 Near 200 K 1126E. Schumann, U. Straube, G. Sorge and L.A. Shuvalov

Thermal Evolution of Phonons in Cu3Au 1129E.C. Svensson, E.D. Hallman and B.D. Gaulin

Polarizability Model of Displacive Type FerroelectricSystems 1132

A. Bussmann-Holder

Phonon Calculations in the Cubic and Tetragonal Phases ofPbTiO3 1135

M.D. Fontana, H. Idrissi and C.Carabatos-Nedelec

Local Condensation at Elastic Phase Transitions 1138F. Schwabl and U.C.Tauber

Lattice Dynamics and Phase Transitions in Pb2CoWO6 1141W. Buhrer, M. Rudlinger, P. Bruesch and H. Schmid

A Quantum Field Theory of Phonons and Melting 1144T. Kitamura

Displacive - Order-Disorder Crossover of the Structural PhaseTransition in A-TCNB under Hydrostatic Pressure 1147

P. Bourges, C. Ecolivet, A. Mierzejewski,Y. Delugeard and A. Girard

Raman Study of the Structural Phase Transitions in Na2SO4 1150B.K. Choi and D.J. Lockwood

XXX

Phonons and Phase Transitions in KDP-Type Crystals »1153P. Simon and F. Gervais

Neutron Scattering Study of the Phase Transformation ofLaNis induced by Hydriding 1156

J.H. Ruan, X.X. Zeng, S. W. Niu, J.M. Zhao,K.D. Yang and C.H. Dai

A Raman Study of the Pressure Induced.Phase Transitions ofthe Alkaline-Earth Fluorides 1159

G.A. Kourouklis and E. AnastassakisFar-IR Studies of Phonons and Plasmons of the PhaseTransition in In2Se3 1162

/. Lelidis, D. Siapkas, C. Julien and M. Balkanski

Vibrational Spectroscopy of Unusual Sequence of StructuralPhase Transitions in Layered Ferroelectrics 1165

V.M. Burlakov and E.A. Vinogradov

Effect of Spin Fluctuation on Phonon Frequency inMetamagnetic Semiconductor HgCr2S4 1168

K. Wakamura

Observation of Correlation Between the Phonon Parametersand the Ionic Motion in Fast-Ionic Conductor Ag3SBr 1171

K. Wakamura and K. Hirokawa

Chapter 12: Defect Scattering and Defect Excitation 1175

High-Frequency Phonons in Ruby 1177H. W. de Wijn and J.I. Dijkhuis

Brillouin Scattering and Theoretical Studies of SuperionicLanthanum Fluoride 1187P.E. Ngoepe, C.R.A. Catlow and J.D. Comins

Brillouin Scattering Investigations of Rare EarthDoped CaF2 in the High Temperature Superionic Region 1190

P.M. Mjwara, J.D. Comins, P.E. Ngoepe and A.V.Chadwick

Thermal Conductivity and Ferroelectric Microregions inUndoped KTaO3 1193

B. Salce, B. Daudin, J.L. Gravil and L.A. Boatner

XXXI

Scattering of Heat Pulses from Ion Implantation Damage at 'Sapphire Surfaces 1196

J.K. Wigmore, H. bin Rani, S.C. Edwards and R.A. Collins

The Stress Dependence of the Sound Velocity in ModeratelySb-Doped Ge 1199

T. Umebayashi, F. Akao and K. Suzuki

The Magnetic Field and Concentration Dependence of a PhononDamping in Hematite 1202

V.S. Lutovinov, V.A. Murashov and T.A. Zharinova

Low-Temperature Phonon Scattering in Plastically Deformed Nband Ta Single Crystals of (001) Orientations 1205

W. Wasserbdch

Local Dynamics of Impurities in Perovskites with Soft Modes 1208N. Kristoffel and M. Klopov

Isotopic Randomness and Isotopic Ordering in Phonon Physics 1211A.A. Berezin

Peculiarities of the A-Symmetry Modes in Mixed DefectChalcopyrites 1214

P.P. Lottici

Localized Mode and Phonon Contribution to the LuminescenceofKZnF3:Cr3+ 1217

Y. Vaills, J.-Y. Buzare and M. Rousseau

Local Vibrational Modes of Isolated Nitrogen Impurities inDiamond 1220

J.J. Sinai, S.Y. Wu and K.S.Dy

Chapter 13: Nonequilibrium Phonons 1223

Phonon Dynamics in Highly Nonequilibrium Systems 1225Y.B. Levinson

A New Nonequilibrium Phonon State 1236W.E. Bron, T. Juhasz and S. Mehta

High Frequency Acoustic Phonon Relaxation 1239D.V. Kazakovtsev, A.A. Maksimov, D.A. Pronin andI.I. Tartakovskii

Luminescence of Semiconductors in the Presence ofNonequilibrium Phonons 1242

A.V. Akimov and A.A. Kaplyanskii

XXXII

Numerical Simulations and Experimental Data on Transport of •«0.7THz Acoustic Phonons in Gallium Arsenide 1245

M. Fieseler, M. Schreiber, R.G. Ulbrich,M. Wenderoth and R. Wichard

Decay of Terahertz-Phonons inMixed-Crystals 1248

U. Happek, W. W. Fischer and K.F. Renk

Polariton Dephasing 1251T. Juhasz and W.E. Bron

Optical Phonons — One-Component Interaction 1254W.E. Bron, S. Mehta, J. Kuhl and M. Klingenstein

Pecularities of Propagation of Noneqilibrium Phonons in SingleCrystals with Anisotropic Impurities 1257

/. Sildos, I. Dolindo and G. Zavt

Exciton Drag by Heat Phonon Pulses in Silicon 1260A.V. Akimov, A.A. Kaplyanskii and E.S. Moskalenko

New Effects in Bound Exciton Recombination Induced byNonequilibrium Acoustic Phonons 1263

B.L. Gelmont, N.N. Zinov'ev, D.I. Kovalev,V.A.Kharchenko, I.D. Yaroshetskii and I.N.Yassievich

Dynamics of 29cm"1 Phonons in Ruby for High PhononOccupation Numbers 1266

M. Siemon, J. Wesner and W. Grill

Resonant Trapping of 29cm""1 Phonons inSubmicron Ruby Layers 1269

R.J. van Wijk, P.J.M. Woltgens, J.I. Dijkhuis,H.W.de Wijn

Effects of Stimulated Emission and Line Broadening onthe 29cm"1 Phonon Bottleneck in Ruby 1272

K.Z. Troost, E. van Brummelen, J.I. Dijkhuis,H.W.de Wijn

Propagation of Nonequilibrium Phonons in Quartz 1275B. Sujak-Cyrul and T. Tyc

Spectrum and Kinetic of Nonequilibrium Acoustic PhononsEmitted by Heated Metallic Film 1278

N.N. Zinov'ev, D.I. Kovalev, V.I. Kozub,I.D. Yaroshetskii

XXXIII

Electrons and Phonons in Non-Equilibrium in Disordered Thin'Narrow Films 1281

G. Bergmann, W. Wei and Y. Zou

Depopulation Effects in the Phonoconduction Response ofA+-States in Silicon and Germanium 1284

P. Gross, M. Gienger and K. Lassmann

Phonon Hot Spot in Ge Crystal _ 1287M.M. Bonch-Osmolovskii, T.I. Galkina, Yu.Yu. Pokrovskiiand A.Y. Blinov

Phonon Hot Spot Formation in GaAs Under Optical Excitation 1290B.A. Danil'chenko, D.V. Kazakovtsev and M.I. Slutskii

Anomalies, Nonequilibrium Phonons and Background of theMeasured Point-Contact Spectra of Cu at 0.7 K 1293

M. Reiffers and P. Samuely

Cooperative Hot-Carrier Dynamics in Extrinsic SemiconductorsSupported by Diffusive Phonon Coupling 1296

J. Parisi, J. Peinke, B. Rohricht and O.E.Rossler

Novel Evidence of Quasiparticle Trapping 1299C. Patel, D.J. Goldie, N.E. Booth and G.J. Salmon

Chapter 14: Transport Phenomena 1303

Picosecond Optics Studies of the Kapitza ResistanceBetween Solids at High Temperature 1305

R. Stoner, D.A. Young, H.J. Maris, J. Taucand H. T. Grahn

Phonon Conduction in Oriented Organic Materials 1308K. Kawasaki, H. Nakamura, M. Matsuura, T. Mugishima,Y. Kogure and Y. Hiki

Electron-Phonon Coupling in Rhodium Thin Films 1311E.T. Swartz and R.O. Pohl

Relaxation of Initially Spatially Unhomogeneous States ofPhonon Gases Scattered by Point Mass Defects Embedded inbotropic Media 1314

Cz. Jasiukiewicz and T. Paszkiewicz

XXXIV

Elastic Scattering of Phonons on Point Mass Defects: *Spectrum of Collision Integral for Long-Wave Acoustic Phononsin Transversely Isotropic Media 1317

T. Paszkiewicz and M. Wilczynski

Hydrodynamic Effects in Solids 1320R.N. Gurzhi and L.P. Mezhov-Deglin

Scattering of Phonons by Fine Particles- 1323Y. Hiki, Y. Kogure, H. Nakamura and K. Kawasaki

The Kapitza Resistance between Liquid 3He and Solid 3He 1326F. Graner, S. Balibar, R. Bowley, P. Nozie'res andE.Rolley

Theory of Kapitza Conductance Between Solids at HighTemperatures 1329

D.A. Young and H.J. Maris

Chapter 15: Phonon Imaging 1333

Current Topics in Phonon Imaging 1335J.P. Wolfe

Phonons and Scanning Tunneling Microscopy 1345H.K. Wickramasinghe, J.M.R. Weaver and C.C. Williams

Acoustic Symmetry and First Order Spatial Dispersion Effectsin Phonon Focusing 1355

A.G. Every

The Role of Phonon Focusing in the Surface TemperatureProfile of a Silicon Wafer heated by a 2DEG 1358

A.G. Every, N.P. Hewett, L.J. Challis and J. Cooper

Phonon Imaging of the Critical Cone and Frustrated TotalInternal Reflection at Solid-Solid Interfaces 1361

C. Hoss, H. Schreyer, W. Dietsche, J. Wolfe and H. Kinder

A Spatially Resolving Heat Pulse Phonon Detector 1364A.J. Kent, G.A. Hardy, P. Hawker and D.C. Hurley

Phonon Imaging: Comparison of Energy and QuasimomentumFocusing in Transversely Isotropic Media 1367

Cz. Jasiukiewicz and T. Paszkiewicz

XXXV

Chapter 16: Particle Detection » 1371

Phonon-Mediated Detection of Elementary Particles 1373B. Cabrera

Phonon-mediated Detection of Particles 1383B. Sadoulet, B. Cabrera, H.J. Maris and J.P. Wolfe

Impact Evaporation of Helium Films as a Phonon Multiplierfor Particle Detection 1394

S. Wurdack, P. Gu'nzel and H. Kinder

Detection of Phonons Created by Single a-Particles 1397Th. Peterreins, F. Probst, J. Jochum,F.v. Feilitzsch, R.L.Mossbauer and H.Kraus

Using Doped Semiconductors for a Cryogenic Phonon Detector 1400N. Wang, B. Sadoulet, F.C. Wellstood, E.E. Haller,J. Beeman

Chapter 17: New Experimental Methods 1403

Measurements of Phonon Dispersion Curves by X-rays withVery High Energy Resolution 1405

B. Dorner, E. Burkel, Th. Illini and J. Peisl

Detection of Ballistic Phonons in Magnetic Fields 1415U. Valbusa and G. Boragno

Optical Detection of Nonequilibrium Terahertz Phonons inDisordered Solids Using Site-Selective FluorescenceExcitation . 1424

S.A. Basun, P. Deren, S.P. Feofilov,A.A. Kaplyanskii and W. Strek

Monochromatic Generation of High-Frequency Phonons ByDefect-Induced One-Phonon Absorption of Far-InfraredRadiation 1427

U. Happek, P.T. Lang and K.F. Renk

|Phonon Attenuation and Velocity Measurements in Fusedlarts by Picosecond Acoustic Interferometry 1430

H.-N. Lin, H.J. Maris, J. Tauc and H. T. Grahn

XXXVI

Piezoelectric Generation and Detection of Extreme Narrow, -Lateral Movable Sound Beams by Means of PlanarElectromagnetic Resonance Structures 1433

Th. Aeugle and 0. Weis

First Results of Inelastic X-Ray Studies on Polycrystallineand Liquid Lithium 1436

E. Burkel, S. Gaus, Th. Illini and J. Peisl

Phase Transition Temperatures Determination withElectrodeless Crystals in a Large Range of Thicknesses 1439

X. Gerbaux

Study of Dynamical Behavior of Interfaces in Solid-LiquidPhase Transition of Metals by Photoacoustic Measurements 1442

S. Kojima

Raman Scattering of Semiconductor Layers Grown by LaserAtomic Layer Epitaxy 1445

T. Miyoshi, Y. Iimura, S. Iwai, Y. Segawa,Y. Aoyagi and S. Namba

Spatially Tunable Superconducting Point-Contact Bolometer 1448K.Z. Troost, M. Barmantlo, J.I. Dijkhuis andH. W. de Wijn

Optimisation and Noise Performance of Constant TemperatureBolometric Phonon Detectors 1451

C.D.H. Williams

Author Index 1455