中国物理B ›› 2004, Vol. 13 ›› Issue (4): 538-541.doi: 10.1088/1009-1963/13/4/022

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Mode-locking behaviour: ac response of a driven disordered vortex lattice

汪友梅, 曹义刚, 焦正宽   

  1. Department of Physics, Zhejiang University, Hangzhou 310027, China
  • 收稿日期:2003-06-24 修回日期:2003-08-22 出版日期:2005-04-22 发布日期:2004-04-20
  • 基金资助:
    Project supported by the Ministry of Science and Technology of China (Grant No NKBRSF-G19990646), the Postdoctoral Science Foundation of China, and the Scientific Research Foundation of State Education Ministry for Returned Overseas Chinese Scholars.

Mode-locking behaviour: ac response of a driven disordered vortex lattice

Wang You-Mei (汪友梅), Cao Yi-Gang (曹义刚), Jiao Zheng-Kuan (焦正宽)   

  1. Department of Physics, Zhejiang University, Hangzhou 310027, China
  • Received:2003-06-24 Revised:2003-08-22 Online:2005-04-22 Published:2004-04-20
  • Supported by:
    Project supported by the Ministry of Science and Technology of China (Grant No NKBRSF-G19990646), the Postdoctoral Science Foundation of China, and the Scientific Research Foundation of State Education Ministry for Returned Overseas Chinese Scholars.

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摘要： Using random pinning force simulations, we study numerically the alternating current (ac) response of the driven disordered vortex lattice. In the presence of a superimposed ac force, mode-locking steps are observed in the velocity－direct current (dc) force characteristics at high dc forces, where a smectic order occurs. The step width shows damped oscillations with the strength of interaction between vortices, in good agreement with recent experiments.

Abstract: Using random pinning force simulations, we study numerically the alternating current (ac) response of the driven disordered vortex lattice. In the presence of a superimposed ac force, mode-locking steps are observed in the velocity－direct current (dc) force characteristics at high dc forces, where a smectic order occurs. The step width shows damped oscillations with the strength of interaction between vortices, in good agreement with recent experiments.

Key words: vortex lattice, mode locking

中图分类号: 

  • 74.25.Qt
74.20.-z (Theories and models of superconducting state)