Effect of Two-Dimensionality on Step Bunching on a Si(001) Vicinal Face | Zendy

Masahide Sato | Zendy; Makio Uwaha | Zendy; Yukio Hirose | Zendy

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Effect of Two-Dimensionality on Step Bunching on a Si(001) Vicinal Face

Author(s) -

Masahide Sato,

Makio Uwaha,

Yukio Hirose

Publication year - 2006

Publication title -

journal of the physical society of japan

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.76

H-Index - 139

eISSN - 1347-4073

pISSN - 0031-9015

DOI - 10.1143/jpsj.75.043601

Subject(s) - vicinal , bunches , diffusion , curse of dimensionality , anisotropy , physics , drift velocity , condensed matter physics , materials science , electron , optics , nuclear physics , computer science , quantum mechanics , machine learning

We study the effect of two-dimensionality on step bunching on a Si(001) vicinal face heated by direct electric current. When the anisotropy of the diffusion coefficient changes alternately on consecutive terraces like a Si(001) vicinal face, bunching occurs with the drift of adatoms. If the wandering fluctuation of step bunches is neglected as in the one-dimensional model, the bunching with step-down drift is faster than that with step-up drift in contradiction with experiment (Latyshev et al.: Appl. Surf. Sci. 130-132 (1998) 139). In a two-dimensional model with a wide system width, the step bunches wander heavily with step-up drift, and the recombination of neighboring bunches occurs more frequently than those with step-down drift. The bunching with step-up drift is accelerated and can be faster than that with step-down drift. ©2006 The Physical Society of Japan.

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