| Mode-Locking Behaviour in Driven Colloids with Random Pinning |
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| 引用本文： | 陈江星 焦正宽. Mode-Locking Behaviour in Driven Colloids with Random Pinning[J]. 中国物理快报, 2007, 24(4): 1095-1098 |
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| 作者姓名： | 陈江星 焦正宽 |
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| 作者单位： | [1]Department of Physics, Hangzhou Dianzi University, Hangzhou 310018 [2]Department of Physics, Zhejiang University, Hangzhou 310027 |
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| 基金项目： | Supported by the National Key Basic Research Special Foundation （NKBRSF） of China under Grant No G19990646 and the Start-up Fund of Hangzhou Dianzi University. |
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| 摘 要： | We find mode-locking steps in simulated force-velocity characteristics of external alternating-force （AF） driven colloids on a disordered substrate. Studies of mode-locking patterns in systems show that mode-locking steps are accompanied with the emergence of a dynamics phase： transverse solid phase. We also study the influence of temperature on the width of mode-locking steps. The mode-locked state is destroyed by thermal fluctuation and the width of mode-locking steps decreases rapidly with increasing temperature. In high velocity and low temperature regimes, due to the appearance of transverse solid phase and microscopically periodic velocity modulation, the step width changes little as temperature is varied.
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| 关 键 词： | 模型锁定行为 胶体 相互作用 动力学 |
| 收稿时间： | 2006-12-27 |
| 修稿时间： | 2006-12-27 |
Mode-Locking Behaviour in Driven Colloids with Random Pinning |
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| CHEN Jiang-Xing,JIAO Zheng-Kuan. Mode-Locking Behaviour in Driven Colloids with Random Pinning[J]. Chinese Physics Letters, 2007, 24(4): 1095-1098 |
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| Authors: | CHEN Jiang-Xing JIAO Zheng-Kuan |
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| Affiliation: | 1Department of Physics, Hangzhou Dianzi University, Hangzhou 310018 ;2Department of Physics, Zhejiang University, Hangzhou 310027 |
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| Abstract: | We find mode-locking steps in simulated force-velocity characteristics of external alternating-force (AF) driven colloids on a disordered substrate. Studies of mode-locking patterns in systems show that mode-locking steps are accompanied with the emergence of a dynamics phase: transverse solid phase. We also study the influence of temperature on the width of mode-locking steps. The mode-locked state is destroyed by thermal fluctuation and the width of mode-locking steps decreases rapidly with increasing temperature. In high velocity and low temperature regimes, due to the appearance of transverse solid phase and microscopically periodic velocity modulation, the step width changes little as temperature is varied. |
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| Keywords: | 82.70.Dd 05.45.-a 05.70.-a |
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