Minimum energy paths for dislocation nucleation in strained epitaxial layers

Details Minimum energy paths for dislocation nucleation in strained epitaxial layers Minimum energy paths for dislocation nucleation in strained epitaxial layers

2002-05-29

arxiv.org/abs/cond-mat/0205620v1

Phys. Rev. B 65, 241408 (2002)

Physics

Condensed Matter

Materials Science

4 pages + 3 figs, to appear in Phys. Rev. B, Rap. Comm

Scientific paper

10.1103/PhysRevB.65.241408

We study numerically the minimum energy path and energy barriers for dislocation nucleation in a two-dimensional atomistic model of strained epitaxial layers on a substrate with lattice misfit. Stress relaxation processes from coherent to incoherent states for different transition paths are determined using saddle point search based on a combination of repulsive potential minimization and the Nudged Elastic Band method. The minimum energy barrier leading to a final state with a single misfit dislocation nucleation is determined. A strong tensile-compressive asymmetry is observed. This asymmetry can be understood in terms of the qualitatively different transition paths for the tensile and compressive strains.

Affiliated with

Also associated with

No associations

Rating

Minimum energy paths for dislocation nucleation in strained epitaxial layers does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Minimum energy paths for dislocation nucleation in strained epitaxial layers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Minimum energy paths for dislocation nucleation in strained epitaxial layers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-169117