Low-frequency plasma in cuprate superconductors and related phenomena

Masashi Tachiki, Saburo Takahashi, Tomio Koyama

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The frequency of the plasma with the c axis polarization in the cuprate superconductors is extremely low and it is lower than the superconducting energy gap in some cuprate. Electromagnetic phenomena caused by the excitation of the plasma are theoretically studied. The light passing through a film of the cuprate superconductor strongly interacts with the transverse component of the plasma. The interference effect of the plasma waves reflected at both sides of the film causes the oscillatory frequency dependence of the reflectivity and transmissivity. When vortices are introduced by an external magnetic field, the vortex motion and the gapless excitation inside the vortex normal cores make the reflectivity and transmissivity strongly field dependent. When a static voltage is applied to a Josephson junction of the cuprate superconductor, the plasma is excited by the ac Josephson effect and the excited plasma decays by emitting light. The excited plasma brings about an anomalous current-voltage characteristics in a weak magnetic field.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherPubl by Society of Photo-Optical Instrumentation Engineers
Number of pages9
ISBN (Print)0819414522, 9780819414526
Publication statusPublished - 1994
Externally publishedYes
EventSuperconducting Superlattices and Multilayers - Los Angeles, CA, USA
Duration: 1994 Jan 241994 Jan 25

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherSuperconducting Superlattices and Multilayers
CityLos Angeles, CA, USA

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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