Magnetic breakdown effect in organic superconductor κ-(BEDT-TTF)2Cu(NCS)2

Takahiko Sasaki, Hideki Sato, Naoki Toyota

Research output: Contribution to journalArticlepeer-review

107 Citations (Scopus)

Abstract

The Shubnikov-de Haas oscillations with a high frequency (3800T), superimposed on the well known, low frequency (625T) oscillations, have been observed above 22T perpendicular to the conducting plane in an organic superconductor κ-(BEDT-TTF)2Cu(NCS)2. The cross-sectional area of the high frequency orbit amounts to just 100% of the first Brillouin zone. This observation is in agreement with the band structure calculations predicting the hole-like closed and the electron-like open Fermi surfaces, which are separated each other by the small energy gap along the Z-M line. The high frequency oscillations are concluded due to the magnetic breakdown effect between these two Fermi surfaces. The cyclotron effective mass of the breakdown orbit is evaluated to be (6.9±0.8)mo, which is about two times heavier than that of 3.5mo for the hole-like Fermi surface.

Original languageEnglish
Pages (from-to)507-510
Number of pages4
JournalSolid State Communications
Volume76
Issue number4
DOIs
Publication statusPublished - 1990 Oct

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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