Optical response of the Josephson vortex lattice in a stack of intrinsic Josephson junctions

Tomio Koyama

Research output: Contribution to journalArticlepeer-review

Abstract

Optical response of a Josephson vortex lattice in a stack of intrinsic Josephson junctions is investigated in two experimental configurations for measuring a microwave absorption spectrum and reflectivity on the bc-plane in high-temperature superconductors. The effective dielectric functions for an oscillatory electric field parallel to the c-direction are derived in these two configurations, which are expressed in terms of the variables containing information about the spatial dependence of the gauge-invariant phase differences in a static Josephson vortex lattice. The optically active small phase oscillation modes of a triangular Josephson vortex lattice are clarified. The lowest resonant frequency under an in-plane magnetic field, H, is located at nearly half the zero-field Josephson plasma frequency and is a weakly decreasing function of H. This result is consistent with the experimental results in Bi-2212 and YBCO.

Original languageEnglish
Pages (from-to)2505-2511
Number of pages7
Journaljournal of the physical society of japan
Volume73
Issue number9
DOIs
Publication statusPublished - 2004 Sep 1

Keywords

  • High-temperature superconductors
  • Intrinsic Josephson effect
  • Josephson plasma resonance
  • Josephson vortex lattice

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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