High-field phase transitions and Fermi surfaces in the organic conductor α-(BEDT-TTF)2KHg(SCN)4: Influence of the magnetic breakdown on evaluation of the effective mass and the scattering time

T. Sasaki, W. Biberacher, T. Fukase

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The change of the de Haas-van Alphen (dHvA) oscillation between the low-field spin-density-wave (SDW) phase and the high-field (H ≥ 23 T) metallic phase of the organic conductor α-(BEDT-TTF)2KHg(SCN)4 is explained in terms of a model of the magnetic breakdown (MB) and a reconstructed Fermi surface by SDW. On the reconstructed Fermi surface, the scattering time obtained by fitting the standard Lifshitz-Kosevich formulation to the dHvA oscillations is affected by the MB giving the additional field-dependent effect. Furthermore, the evaluation of the effective mass needs to consider the additional temperature-dependent factor being due to the MB gap which may change intrinsically and/or thermally with temperature.

Original languageEnglish
Pages (from-to)303-306
Number of pages4
JournalPhysica B: Condensed Matter
Volume246-247
DOIs
Publication statusPublished - 1998 May 29

Keywords

  • De Haas-van Alphen oscillation
  • Effective mass
  • Organic conductor

ASJC Scopus subject areas

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

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