计算物理 ›› 2003, Vol. 20 ›› Issue (1): 91-94.

• 论文 • 上一篇    

超晶格电流振荡的分岔图和Poincaré映射

张启义, 田强   

  1. 北京师范大学物理系, 北京 100875
  • 收稿日期:2001-06-26 修回日期:2001-09-10 出版日期:2003-01-25 发布日期:2003-01-25
  • 作者简介:张启义(1977-),男,山东泰安,硕士,从事超晶格中电输运方面的理论研究.
  • 基金资助:
    教育部高等学校骨干教师资助项目

Bifurcation Diagrams and Poincar Maps of Current-oscillations in Superlattices

ZHANG Oi-yi, TIAN Oiang   

  1. Department of Physics, Beijing Normal University, Beijing 100875, China
  • Received:2001-06-26 Revised:2001-09-10 Online:2003-01-25 Published:2003-01-25

摘要: 基于超晶格输运的分立漂移模型,数值模拟了掺杂弱耦合GaAs AlAs超晶格在外加交流偏压下电场畴的输运行为.以黄金分割比固定交流驱动频率,模拟并分析不同交流幅度下电流的准周期、锁频及混沌现象.

关键词: 超晶格, 电流振荡, 分岔图, Poincaré, 映射

Abstract: The transportation behavior of electric-field domains in a n-doped weakly coupled GaAs/AlAs superlattices under dc+ac voltage bias is studied numerically within a discrete drift model.Fixing the ac driving frequency at the golden mean ratio,the quasiperiodicity、requency-locking and chaos of the current for different ac amplitude are analyzed.

Key words: superiattices, current oscillation, bifurcation diagram, Poincaré, map

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