Journal of the Society of Materials Science, Japan
Online ISSN : 1880-7488
Print ISSN : 0514-5163
Original Papers
Step-Growth Anisotropy on Thin Film Epitaxial Process
Kohei KUNIZAWAMasahiro YAMAMOTOShigenobu OGATAYoji SHIBUTANI
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Volume 57 (2008) Issue 8 Pages 780-785

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Abstract

Anisotropic growth process of two kinds of steps on Al(111) substrates is performed using kinetic Monte Carlo (kMC) method. Employed kMC parameters of activation energy and attempt frequency are estimated by nudged elastic band (NEB) method and transition state theory. Obtained set of results suggest that degree of the anisotropic growth clearly depends on substrate temperature and deposition rate. We find microscopic origin of the anisotropic growth is difference of diffusion rates along {111} and {100} steps, and there is a particular growth condition in which strong anisotropy is observed. At high deposition rate and low temperature, new islands which are easily generated on terraces, hinder the growth anisotropy weaker.

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© 2008 by The Society of Materials Science, Japan
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