中国物理B ›› 2015, Vol. 24 ›› Issue (11): 117303-117303.doi: 10.1088/1674-1056/24/11/117303

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

Dynamic responses of series parallel-plate mesoscopic capacitors to time-dependent external voltage

王锦华a, 全军b   

  1. a College of Public Administration, Huazhong University of Science and Technology, Wuhan 430074, China;
    b School of Physics Science and Technology, Lingnan Normal University, Zhanjiang 524048, China
  • 收稿日期:2015-04-20 修回日期:2015-07-15 出版日期:2015-11-05 发布日期:2015-11-05
  • 通讯作者: Quan Jun E-mail:quanj@lingnan.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11304276), the Natural Science Foundation of Guangdong Province, China (Grant No. 2014A030307035), the Cultivation of Innovative Talents in Colleges and Universities of Guangdong Province, China (Grant No. LYM10098), and the Doctor Subject Foundation of Lingnan Normal University of China (Grant No. ZL1004).

Dynamic responses of series parallel-plate mesoscopic capacitors to time-dependent external voltage

Wang Jin-Hua (王锦华)a, Quan Jun (全军)b   

  1. a College of Public Administration, Huazhong University of Science and Technology, Wuhan 430074, China;
    b School of Physics Science and Technology, Lingnan Normal University, Zhanjiang 524048, China
  • Received:2015-04-20 Revised:2015-07-15 Online:2015-11-05 Published:2015-11-05
  • Contact: Quan Jun E-mail:quanj@lingnan.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11304276), the Natural Science Foundation of Guangdong Province, China (Grant No. 2014A030307035), the Cultivation of Innovative Talents in Colleges and Universities of Guangdong Province, China (Grant No. LYM10098), and the Doctor Subject Foundation of Lingnan Normal University of China (Grant No. ZL1004).

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摘要： We investigate the dynamic responses of the series parallel-plate mesoscopic capacitors to a time-dependent external voltage. The results indicate that the quantum coherence between two capacitors strongly depends on the frequency of the external voltage and the distance between the two capacitors (c-c distance). The behaviors of the series capacitance incompletely follow the Kirchhoff’s laws; only in the low frequency case or the limit of the c-c distance, the capacitance approaches to the classical series capacitance. In addition, the real part of the frequency-dependent capacitance shows a maximum and a minimum, which appear around the peak of the imaginary part. These phenomena may be associated with the plasmon excitation in the mesoscopic capacitors.

关键词: electron transport, mesoscopic capacitor, capacitance, quantum coherence

Abstract: We investigate the dynamic responses of the series parallel-plate mesoscopic capacitors to a time-dependent external voltage. The results indicate that the quantum coherence between two capacitors strongly depends on the frequency of the external voltage and the distance between the two capacitors (c-c distance). The behaviors of the series capacitance incompletely follow the Kirchhoff’s laws; only in the low frequency case or the limit of the c-c distance, the capacitance approaches to the classical series capacitance. In addition, the real part of the frequency-dependent capacitance shows a maximum and a minimum, which appear around the peak of the imaginary part. These phenomena may be associated with the plasmon excitation in the mesoscopic capacitors.

Key words: electron transport, mesoscopic capacitor, capacitance, quantum coherence

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

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