nanohub simulation lab description
DESCRIPTION
Problem descriptions and simulation parameters.TRANSCRIPT
EEE 352 Electronic Materials and Devices—Lab Projects
Lab 1—Due August 29
Site: Nanohub.org
Each student should go to www.nanohub.org and get their own account name and password (they are free). This site is a collection of tools for use in electrical engineering. These tools have been created by, and are used by, people the world over. We will use a number of these tools throughout the course in the labs that you will be asked to endure. These lab exercises replace the Friday lectures, and the reports will be due each Monday.
You will also need to acquire (if you don’t have it) a program which enables screen capture to a image file. This comes with Macs as the “Grab” utility. There are a variety of such programs for the PC, either free or for a nominal charge.
Tool: Crystal Viewer Tool
The purpose of this lab is to gain familiarity with crystal structures and their forms. You will be asked to get pictures of different views of some structures and lattice planes for your report. You can compare the results of the Nanohub structure with that available at http://cst-‐www.nrl.navy.mil/lattice/.
Open the tool. Note that on the topmost pulldown menu, you can choose either “material” or “crystal systems and Bravais lattices.” We will start with the first of these choices.
1. Choose “diamond/silicon” and the (100) plane. Select only a single atom under “size of Miller plane.” Press “simulate.” Rotate the image so that you are looking at a cube face. Plot this image and the corresponding Miller plane (red atoms, you must rotate the image so that these form a line parallel to a cube face).
2. Choose “zincblende/GaAs” and the (110) plane. Select only a single atom under “size of Miller plane.” Press “simulate.” Rotate the image so that the top and bottom faces are vertical and you are looking in a (110) direction. Plot this image and the corresponding Miller plane (red atoms, you must rotate the image so that these form a vertical line and the (110) plane is in the surface of the image).
3. Choose “zincblende/GaAs” and the (111) plane. Select only a single atom under “size of Miller plane.” Press “simulate.” Rotate the image so that it is clear you are looking along the body diagonal. Plot this image and the corresponding Miller plane (again, you must rotate the image so that it is clear you are looking along the body diagonal, and the light blue atoms form the plane).
4. Choose “wurtzite/GaN” and the (0001) plane. Select only a single atom under “size of Miller plane.” Press “simulate.” Rotate the image so that the two blue atoms are centered in the unit cell (a diamond shape). Plot this image and the
corresponding Miller plane (you must rotate the image until the hexagonal (red atoms) structure is clear).
5. Choose “crystal systems and Bravais lattices.” Choose the BCC lattice and the (200) lattice plane (hkl). Choose angle good angle to show all 9 atoms of the cube. Plot this and the Miller plane for the cube (you have to rotate it so that the green atom obscures the dark blue atom, then you are looking in the proper direction).
In your report, enter the 10 images, and discuss the properties and meaning of each of these. Do not spend more than a line or two on each. You should supplement the images with proper drawings of the appropriate Miller planes.