中国物理B ›› 2011, Vol. 20 ›› Issue (7): 77201-077201.doi: 10.1088/1674-1056/20/7/077201

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Dynamic electron transport theory for multiprobe mesoscopic structures

田英1, 全军2, 张军2, 邵乐喜2   

  1. (1)Center of Liberal Education, Zhanjiang Normal University, Zhanjiang 524048, China; (2)School of Physics Science and Technology, Zhanjiang Normal University, Zhanjiang 524048, China
  • 收稿日期:2010-12-30 修回日期:2011-03-06 出版日期:2011-07-15 发布日期:2011-07-15

Dynamic electron transport theory for multiprobe mesoscopic structures

Quan Jun(全军)a), Tian Ying (田英)b), Zhang Jun(张军)a)c)†, and Shao Le-Xi(邵乐喜)a)   

  1. a School of Physics Science and Technology, Zhanjiang Normal University, Zhanjiang 524048, China; b Center of Liberal Education, Zhanjiang Normal University, Zhanjiang 524048, China; c  Shenzhen Institute of Advanced Integration Technology, Shenzhen 518055, China
  • Received:2010-12-30 Revised:2011-03-06 Online:2011-07-15 Published:2011-07-15

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摘要： Using the linear response theory and random phase approximation, we develop a general dynamic electron transport theory for multiprobe mesoscopic structures in an arbitrarily time-dependent external field. In this case, the responses of the dynamic current, charge and internal potential to the external fields can be determined self-consistently. Without loss of generality, charge (current) conservation and gauge invariance under a potential shift are satisfied. As an example, we employ a quantum wire with a single barrier to discuss the response of the internal potential.

关键词: mesoscopic structure, linear response theory, electron transport, quantum wire

Abstract: Using the linear response theory and random phase approximation, we develop a general dynamic electron transport theory for multiprobe mesoscopic structures in an arbitrarily time-dependent external field. In this case, the responses of the dynamic current, charge and internal potential to the external fields can be determined self-consistently. Without loss of generality, charge (current) conservation and gauge invariance under a potential shift are satisfied. As an example, we employ a quantum wire with a single barrier to discuss the response of the internal potential.

Key words: mesoscopic structure, linear response theory, electron transport, quantum wire

中图分类号:  (Theory of electronic transport; scattering mechanisms)

  • 72.10.-d
73.23.-b (Electronic transport in mesoscopic systems)