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Dislocation Mobilities in GaN from Molecular Dynamics Simulations

Published online by Cambridge University Press:  02 February 2015

N. Scott Weingarten
N. Scott Weingarten*
Affiliation:
U.S. Army Research Laboratory, Building 4600, Aberdeen Proving Ground, MD 21005, U.S.A.
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Abstract

The results of molecular dynamics (MD) simulations of dislocation glide in GaN using a Tersoff potential are presented. The simulation methodology involves applying a constant shear stress to a single crystal system containing an individual dislocation, with multiple slip systems considered. Upon reaching a steady state, the dislocation velocity as a function of applied stress and temperature are determined. Edge dislocations with a-type Burgers vectors in the basal, prismatic and pyramidal planes have been analyzed over the temperature range of 300-1300K. The results from simulations of c-type edge dislocations at 1300 K are also presented.

Keywords

III-Vdislocationssimulation

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