Quantum theory for the longitudinal Josephson plasma in high-Tc superconductors: QED in 1D Josephson junction array

Tomio Koyama

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

We present a new microscopic theory based on the quantum electrodynamics for the longitudinal Josephson plasma in strongly anisotropic high-Tc superconductors. The longitudinal electric field is quantized in terms of the phason gauge in which the phason velocity is sell-consistently determined. The longitudinal photon propagator is calculated within the 2nd order tunneling process from which the Josephson effect arises. The longitudinal dielectric function is also derived. The dispersion relation and the temperature dependence of the longitudinal Josephson plasma propagating in the direction of the layer stacking is calculated from the dielectric function. It is predicted that the Josephson plasma frequency vanishes at Tc in the case where the interlayer coupling constant is less than some critical value.

Original languageEnglish
Pages (from-to)2010-2018
Number of pages9
Journaljournal of the physical society of japan
Volume68
Issue number6
DOIs
Publication statusPublished - 1999 Jun

Keywords

  • 1D Josephson-junction array
  • Dielectric function
  • High-T superconductors
  • Josephson plasma

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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