Frequency oscillations of the Shapiro steps

被引：21
|
作者：
Hu, Bambi
Tekic, Jasmina [1 ]
机构：
[1] Hong Kong Baptist Univ, Ctr Nonlinear Studies, Dept Phys, Hong Kong, Hong Kong, Peoples R China
[2] Hong Kong Baptist Univ, Beijing Hong Kong Singapore Joint Ctr Nonlinear &, Hong Kong, Hong Kong, Peoples R China
[3] Univ Houston, Dept Phys, Houston, TX 77204 USA
[4] Univ Houston, Dept Phys, Houston, TX 77204 USA
来源：
APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 10期
关键词：
D O I：
10.1063/1.2710788
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The frequency dependence of the dynamical-mode locking phenomena in the ac driven dissipative Frenkel-Kontorova model is studied by the molecular-dynamics simulations. It was found that the Shapiro steps exhibit very strong frequency dependence influenced by the amplitude of ac force. At the low frequencies, in the large amplitude regime, the oscillations of the step width and the critical depinning force have been observed. These oscillations are directly related to the stability and the existence of the interference effects in the real systems. (c) 2007 American Institute of Physics.
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页数：3
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