mit opencourseware ...upper lower z y x crystal dimensions [100][010][001] crystal restriction of...

7
MIT OpenCourseWare http://ocw.mit.edu 3.021J / 1.021J / 10.333J / 18.361J / 22.00J Introduction to Modeling and Simulation Spring 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms.

Upload: others

Post on 04-Oct-2020

0 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: MIT OpenCourseWare ...upper lower z y x Crystal dimensions [100][010][001] crystal Restriction of atomic motion 1=free to move 0=fixed Displacements in particular direction.xyz file

MIT OpenCourseWare http://ocw.mit.edu

3.021J / 1.021J / 10.333J / 18.361J / 22.00J Introduction to Modeling and Simulation Spring 2008

For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms.

Page 2: MIT OpenCourseWare ...upper lower z y x Crystal dimensions [100][010][001] crystal Restriction of atomic motion 1=free to move 0=fixed Displacements in particular direction.xyz file

ITAP IMDCode for nanowire simulations

Uses: EAM force field

Page 3: MIT OpenCourseWare ...upper lower z y x Crystal dimensions [100][010][001] crystal Restriction of atomic motion 1=free to move 0=fixed Displacements in particular direction.xyz file

Select “Pipelines” IMDElastic, click on “run“

IMDNanowire

Page 4: MIT OpenCourseWare ...upper lower z y x Crystal dimensions [100][010][001] crystal Restriction of atomic motion 1=free to move 0=fixed Displacements in particular direction.xyz file

upper

lower z

y x

Crystal dimensions [100][010][001] crystal

Restriction of atomic motion

1=free to move

0=fixed

Displacements in particular direction

Every Nd steps

PBCs in x,y,z direction? 1=yes 0=no

Initial temperature:

Basically ~0 K

Page 5: MIT OpenCourseWare ...upper lower z y x Crystal dimensions [100][010][001] crystal Restriction of atomic motion 1=free to move 0=fixed Displacements in particular direction.xyz file

.xyz file that makes movie when loaded in VMD

Energy, stress tensor, temperature.. vs. simulation steps – very useful for analysis in Excel or Matlab

First line contains description of content

The following sections contain .png files and .gif animations for views in three different angles

Page 6: MIT OpenCourseWare ...upper lower z y x Crystal dimensions [100][010][001] crystal Restriction of atomic motion 1=free to move 0=fixed Displacements in particular direction.xyz file

VMD output

VMDMovie.xyz file

Page 7: MIT OpenCourseWare ...upper lower z y x Crystal dimensions [100][010][001] crystal Restriction of atomic motion 1=free to move 0=fixed Displacements in particular direction.xyz file

In VMD: Click on Graphics Representations

Select “VDW” as “Drawing Method” to plot spheres

This makes it look much nicer

Create snapshot files in File Render: or, alternatively simply take screenshots for your writeup