Plasma excitations in the superconducting state of two-band layered superconductors

T. Koyama, H. Matsumoto, M. Machida

Research output: Contribution to journalArticlepeer-review


We investigate the low-frequency plasma modes polarized in the c-direction in two-band layered superconductors. The dynamic dielectric function ε{lunate} (ω, q) is derived at T = 0, using the generalized random-phase-approximation which is consistent with the Hartree-Fock single-particle states. It is shown that the dielectric function has two zero-points which correspond to the longitudinal plasma modes in two-band layered superconductors.

Original languageEnglish
Pages (from-to)1048-1051
Number of pages4
JournalPhysica C: Superconductivity and its applications
Issue number15-20
Publication statusPublished - 2009 Oct 15


  • Dielecrtic function
  • Plasma mode
  • Two-band superconductors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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