Dynamics of step flow in a model of heteroepitaxy
Dynamics of step flow in a model of heteroepitaxy
We have investigated step-flow dynamics during growth of a periodic heterostructure on a vicinal surface, assuming different growth velocities for homoepitaxy and heteroepitaxy. Depending on the ratio of the two velocities for each of the two materials of the heterostructure, steps evolve from their initial distribution to closely spaced bunches of steps separated by wide terraces or they evolve to a common average terrace width. We present a mathematical analysis of the process in the latter regime and identify its boundary in a parameter space comprised of the two dimensionless velocity ratios. We verify this boundary by comparison with computer simulations and previously published experimental results.
2428 -2434
Wheeler, A.A.
eb831100-6e51-4674-878a-a2936ad04d73
Ratsch, C.
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Morales, A.
88846fd1-bec4-444d-971c-79b66f583051
Cox, H.M.
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Zangwill, A.
67aced1b-a445-40da-8c73-1dd8ac3e727c
1992
Wheeler, A.A.
eb831100-6e51-4674-878a-a2936ad04d73
Ratsch, C.
888cd626-6546-4cbf-b897-aa7b6befb8bd
Morales, A.
88846fd1-bec4-444d-971c-79b66f583051
Cox, H.M.
adbeba10-b780-4997-bff7-2753716ff2a8
Zangwill, A.
67aced1b-a445-40da-8c73-1dd8ac3e727c
Wheeler, A.A., Ratsch, C., Morales, A., Cox, H.M. and Zangwill, A.
(1992)
Dynamics of step flow in a model of heteroepitaxy.
Physical Review B, 46 (4), .
(doi:10.1103/PhysRevB.46.2428).
Abstract
We have investigated step-flow dynamics during growth of a periodic heterostructure on a vicinal surface, assuming different growth velocities for homoepitaxy and heteroepitaxy. Depending on the ratio of the two velocities for each of the two materials of the heterostructure, steps evolve from their initial distribution to closely spaced bunches of steps separated by wide terraces or they evolve to a common average terrace width. We present a mathematical analysis of the process in the latter regime and identify its boundary in a parameter space comprised of the two dimensionless velocity ratios. We verify this boundary by comparison with computer simulations and previously published experimental results.
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Published date: 1992
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Local EPrints ID: 812
URI: http://eprints.soton.ac.uk/id/eprint/812
ISSN: 1550-235X
PURE UUID: aa74ee62-23fd-4b67-9509-d3d1fb2a8aba
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Date deposited: 25 Mar 2004
Last modified: 15 Mar 2024 04:42
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Author:
A.A. Wheeler
Author:
C. Ratsch
Author:
A. Morales
Author:
H.M. Cox
Author:
A. Zangwill
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