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Instabilities Of Permeable Steps Induced By The Drift Of Adatoms

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  • MASAHIDE SATO

    (Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan;
    Computer Center, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan)

  • MAKIO UWAHA

    (Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan)

  • YUKIO SAITO

    (Department of Physics, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan)

Abstract

We study the effect of permeability on the two types of step instabilities, bunching and wandering. When the step is permeable for adatom diffusion, the wandering instability occurs with step-down drift and the bunching instability occurs with step-up drift. In contrast, when the step is impermeable for adatom diffusion, both the wandering and the bunching instabilities occur with step-down drift. We derive the linear amplification rates of step fluctuation and the critical drift velocities to induce the instabilities. The results of the linear analysis are tested by Monte Carlo simulation.

Suggested Citation

  • Masahide Sato & Makio Uwaha & Yukio Saito, 2000. "Instabilities Of Permeable Steps Induced By The Drift Of Adatoms," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 7(05n06), pages 607-611.
    • Handle: RePEc:wsi:srlxxx:v:07:y:2000:i:05n06:n:s0218625x00000737
    DOI: 10.1142/S0218625X00000737
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    Keywords

    ; 81.10.Aj; 05.70.Ln; 47.20.Hw; 68.35.Fx;
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