北京大学学报(自然科学版)

蒙特卡罗方法模拟无序涡旋系统中的相图

陈硕1,李定平1,林宏烨2,儒森斯坦2   

  1. 1. 北京大学物理学院, 北京100871; 2.台湾交通大学, 新竹;
  • 收稿日期:2009-04-27 出版日期:2009-11-20 发布日期:2009-11-20

Monte Carlo Simulation of Vortex Phase with Disorder

CHEN Shuo1, LI Dingping1, LIN Hung Yeh2, B.Rosenstein2   

  1. 1. School of Physics, Peking University, Beijing 100871; 2. National Chiao Tung University, Hsinchu;
  • Received:2009-04-27 Online:2009-11-20 Published:2009-11-20

摘要: 从GL( Ginzburg-Landau) 自由能出发,在最低朗道能级近似下, 用蒙特卡罗的方法模拟了二维无序第二类超导体涡旋态系统。对于纯净的涡旋系统, 得到了从涡旋固态到涡旋液态的一级相变, 验证了前人的理论。对于无序的涡旋系统, 发现低温区域存在Bragg玻璃态。

关键词: 蒙特卡罗, Bragg玻璃态

Abstract: Based on the Ginzburg-Landau model, using lowest Landau level approximation, Monte Carlo simulations are performed to investigate the vortex phase in type II two-dimension super conductors. For the clean system, the first order phase transition from vortex solidto vortex liquidis obtained, which is in agreement with previous works in the literature. In contrast, for the weak disorder system, the Bragg glass phase is observed.

Key words: Monte Carlo, Bragg glass

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