中国物理B ›› 2013, Vol. 22 ›› Issue (7): 77304-077304.doi: 10.1088/1674-1056/22/7/077304

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

Contact effect in the dynamic electron transport of two-probe mesoscopic conductor

全军, 肖世发, 田英   

  1. School of Physics Science and Technology, Zhanjiang Normal University, Zhanjiang 524048, China
  • 收稿日期:2013-01-16 修回日期:2013-02-22 出版日期:2013-06-01 发布日期:2013-06-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11147152), the Natural Science Foundation of Guangdong Province, China (Grant No. S2011040002130), and the Youth Program of Zhanjiang Normal University, China (Grant No. L0702).

Contact effect in the dynamic electron transport of two-probe mesoscopic conductor

Quan Jun (全军), Xiao Shi-Fa (肖世发), Tian Ying (田英)   

  1. School of Physics Science and Technology, Zhanjiang Normal University, Zhanjiang 524048, China
  • Received:2013-01-16 Revised:2013-02-22 Online:2013-06-01 Published:2013-06-01
  • Contact: Tian Ying E-mail:rgquan0224@gmail.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11147152), the Natural Science Foundation of Guangdong Province, China (Grant No. S2011040002130), and the Youth Program of Zhanjiang Normal University, China (Grant No. L0702).

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摘要： Based on the self-consistent electron dynamic transport theory for multi-probe mesoscopic systems, we calculate the distribution of internal potential, charge density, and ac conductance of a two-probe mesoscopic conductor with wide trapezoid reservoirs, and study the contact effect. The results show that including the contact effect can make a significant difference to the frequency-dependent electron transport properties. In the nonzero frequency case, the internal potential and the charge density are complex with extremely small imaginary parts. Importantly, the imaginary part of the charge density gives rise to a real ac conductance (admittance), which corresponds to the charge-relaxation resistance.

关键词: mesoscopic system, electron transport, conductance, charge density

Abstract: Based on the self-consistent electron dynamic transport theory for multi-probe mesoscopic systems, we calculate the distribution of internal potential, charge density, and ac conductance of a two-probe mesoscopic conductor with wide trapezoid reservoirs, and study the contact effect. The results show that including the contact effect can make a significant difference to the frequency-dependent electron transport properties. In the nonzero frequency case, the internal potential and the charge density are complex with extremely small imaginary parts. Importantly, the imaginary part of the charge density gives rise to a real ac conductance (admittance), which corresponds to the charge-relaxation resistance.

Key words: mesoscopic system, electron transport, conductance, charge density

中图分类号:  (Electronic transport in mesoscopic systems)

  • 73.23.-b
73.40.-c (Electronic transport in interface structures)