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INSTABILITIES OF PERMEABLE STEPS INDUCED BY THE DRIFT OF ADATOMS

Masahide Sato, Makio Uwaha and Yukio Saito
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Masahide Sato: Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, 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

Surface Review and Letters (SRL), 2000, vol. 07, issue 05n06, 607-611

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.

Keywords: 81.10.Aj; 05.70.Ln; 47.20.Hw; 68.35.Fx (search for similar items in EconPapers)
Date: 2000
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DOI: 10.1142/S0218625X00000737

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