Renormalization of Capacitance in Ultrasmall Superconducting Tunnel Junctions

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概要

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• The effective dielectric constant of a tunnel junction of identical superconduc-tors is calculated with use of the Kramers-Kronig dispersion relation. At I=0,a new expression for the renormalized capacitance of a weakly coupled junctionis derived which is parametrized by ,v= e'/2CA ; the ratio of electrostatic chargingenergy to the superconducting gap A. For ,v<<1 the results agree with the recentcalculation of Eckern, Sch6n and Ambegaokar. Significant differences are foundfor ,X'>1: The renormalization is strongly reduced and remains finite for J=0.The theory finds useful application in the theory of phase ordering in granularsuperconductors.

• 一般社団法人日本物理学会の論文
• 1985-07-15

著者

• Simanek E.

  Department of Physics, University of California

• Simanek E.

  Department of Physics,University of California,Riverside

関連論文

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• Role of Electron-Phonon Interaction in the Theory of Infrared Divergence in Metals
• Renormalization of Capacitance in Ultrasmall Superconducting Tunnel Junctions

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