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Dynamic response of the coherent parallel-plate capacitor to the external field

Liu Yi-Xing Quan Jun Yu Ya-Bin

Dynamic response of the coherent parallel-plate capacitor to the external field

Liu Yi-Xing, Quan Jun, Yu Ya-Bin
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  • PDF Downloads:  1069
  • Cited By: 0
Publishing process
  • Received Date:  17 May 2009
  • Accepted Date:  12 June 2009
  • Published Online:  15 February 2010

Dynamic response of the coherent parallel-plate capacitor to the external field

  • 1. (1)国防科技大学理学院,长沙 410073; (2)湖南大学物理与微电子科学学院,长沙 410082

Abstract: We discuss the capacitance of a coherent mesoscopic parallel-plate capacitor based on the self-consistent theory of dynamic response for mesoscopic systems. The results show that the capacitance is a complex function of frequency which is strongly dependent on the frequency of the external field. The capacitance-frequency curve shows a significant characteristic that a peak in the imaginary part of the capacitance corresponds to the minimum in the real part, and further study shows that they are related to a plasmon-like excitation. In addition,we discuss the size effect of the capacitor, and find that the capacitance approaches geometric capacitance when the distance between two plates of the capacitor is very large.

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