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Ion beam induced surface pattern formation and stable travelling wave solutions

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posted on 08.03.2013 by Satoshi Numazawa, Roger Smith
The formation of ripple structures on ion bombarded semiconductor surfaces is examined theoretically. Previous models are discussed and a new nonlinear model is formulated, based on the infinitesimal local atomic relocation induced by elastic nuclear collisions in the early stages of collision cascades and an associated density change in the near surface region. Within this framework ripple structures are shown to form without the necessity to invoke surface diffusion or large sputtering as important mechanisms. The model can also be extended to the case where sputtering is important, and it is shown that in this case certain 'magic' angles can occur at which the ripple patterns are most clearly defined. The results are in very good agreement with experimental observations.

History

School

  • Science

Department

  • Mathematical Sciences

Citation

NUMAZAWA, S. and SMITH, R., 2013. Ion beam induced surface pattern formation and stable travelling wave solutions. Journal of Physics Condensed Matter, 25 (9), 095003 (12pp).

Publisher

© IOP Publishing Ltd.

Version

AM (Accepted Manuscript)

Publication date

2013

Notes

This article was published in the Journal of Physics: Condensed Matter [© IOP Publishing Ltd.] and the definitive version is available at: http://dx.doi.org/10.1088/0953-8984/25/9/095003

ISSN

0953-8984

eISSN

1361-648X

Language

en

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