Directional Mode-Locking of Dynamics of Two-Dimensional Superparamagnetic Colloidal System in a Periodic Pinning Array

Using Langevin simulations, we study numerically the directional mode-locking of the dynamics of two- dimensional superpararnagnetic colloidal system in a periodic pinning array. When the colloidal particles are initially commensurate with the pinning sites, there appear mode-locking steps in the av...

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Bibliographic Details
Published inCommunications in theoretical physics Vol. 57; no. 2; pp. 320 - 322
Main Author 张哲斐 董永强 曹义刚
Format Journal Article
LanguageEnglish
Published 01.02.2012
Subjects
Arrays
Colloids
Computer simulation
Dynamic tests
Dynamical systems
Dynamics
Pinning
Two dimensional
二维
动力学
周期性
模式锁定
胶体系统
超顺磁性
钉扎
阵列
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Summary:Using Langevin simulations, we study numerically the directional mode-locking of the dynamics of two- dimensional superpararnagnetic colloidal system in a periodic pinning array. When the colloidal particles are initially commensurate with the pinning sites, there appear mode-locking steps in the average velocity of colloidal particles along certain directions of the external driving force. With an increase in the pinning strength, the width of the step increases linearly but the velocity at the step decreases parabolically.
Bibliography:superparamagnetic colloidal particle, Langevin simulation, directional mode-locking
Using Langevin simulations, we study numerically the directional mode-locking of the dynamics of two- dimensional superpararnagnetic colloidal system in a periodic pinning array. When the colloidal particles are initially commensurate with the pinning sites, there appear mode-locking steps in the average velocity of colloidal particles along certain directions of the external driving force. With an increase in the pinning strength, the width of the step increases linearly but the velocity at the step decreases parabolically.
ZHANG Zhe-Fei, DONG Yong-Qiang, CAO Yi-Gang （1School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, China 2Information College of Electronic-Engineering, Xuchang University, Xuchang 310018, China）
11-2592/O3
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0253-6102
DOI:10.1088/0253-6102/57/2/26