On the low-temperature enhancement of the hall coefficient in an organic superconductor κ-(BEDT-TTF)2Cu(SCN)2; Two-band approach

Takahiko Sasaki, Naoki Toyota

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The energy gap Eg at the zone boundary between the closed cylindrical and opened planar Fermi surfaces is found to be (54±10)K and the Fermi energy EF is (740±100)K in the organic superconductor κ-(BEDT-TTF)2Cu(SCN)2 by the analysis of the magnetic breakdown effect on the Shubnikov-de Haas oscillations in high magnetic fields. We propose a two-band model with the small Eg and EF in order to explain the puzzling enhancement of the Hall coefficient below 50-70K (which is close to Eg) observed by other groups. This model is in good agreement with the experimental results of the enhancement around T≅Eg. The non-linear magnetic field dependence of the Hall resistance which we have at high-fields (>12T) and low-temperature at 4.2K (≪Eg) is consistent with our model.

Original languageEnglish
Pages (from-to)2303-2308
Number of pages6
JournalSynthetic Metals
Volume56
Issue number1
DOIs
Publication statusPublished - 1993 Mar 29

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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