کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
797043 1467153 2008 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dynamics of terraces on a silicon surface due to the combined action of strain and electric current
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Dynamics of terraces on a silicon surface due to the combined action of strain and electric current
چکیده انگلیسی

A (0 0 1) surface of silicon consists of terraces of two variants, which have an identical atomic structure, except for a 90° rotation. We formulate a model to evolve the terraces under the combined action of electric current and applied strain. The electric current motivates adatoms to diffuse by a wind force, while the applied strain motivates adatoms to diffuse by changing the concentration of adatoms in equilibrium with each step. To promote one variant of terraces over the other, the wind force acts on the anisotropy in diffusivity, and the applied strain acts on the anisotropy in surface stress. Our model reproduces experimental observations of stationary states, in which the relative width of the two variants becomes independent of time. Our model also predicts a new instability, in which a small change in experimental variables (e.g., the applied strain and the electric current) may cause a large change in the relative width of the two variants.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Mechanics and Physics of Solids - Volume 56, Issue 1, January 2008, Pages 267–278
نویسندگان
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