Control of chaotic wandering of an isolated step by the drift of adatoms

被引:31
作者
Sato, M
Uwaha, M
Saito, Y
机构
[1] Nagoya Univ, Dept Phys, Chikusa Ku, Nagoya, Aichi 4648602, Japan
[2] Gakushuin Univ, Ctr Comp, Toshima Ku, Tokyo 1718588, Japan
[3] Keio Univ, Dept Phys, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan
关键词
D O I
10.1103/PhysRevLett.80.4233
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The drift of adatoms strongly influences the wandering pattern of an isolated step moving in a surface diffusion field. When the drift velocity has a component against the step motion and exceeds a critical value, the straight step becomes unstable with long wavelength fluctuations: and wanders. This wandering pattern can be controlled by changing the direction of the drift. When the drift has no component parallel to the step edge, the unstable step obeys the Kuramoto-Sivashinsky equation and shows a chaotic pattern. When the drift has a component parallel to the step edge, the step obeys the Benney equation. If the parallel component is sufficiently large, the step shows a regular pattern.
引用
收藏
页码:4233 / 4236
页数:4
相关论文
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