Angle-dependent magnetoresistance oscillations and charge density wave in the organic conductor α-(BEDT-TTF)2KHg(SCN)4

Kazuhito Uchida, Ryu Yamaguchi, Takako Konoike, Toshihito Osada, Woun Kang

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4 Scopus citations

Abstract

We have performed full stereographic study on angle-dependent magnetoresistance oscillations (AMROs) in the layered organic conductor, α-(BEDT-TTF)2KHg(SCN)4, which shows a charge density wave (CDW) transition at Tc. AMROs originating from normal Fermi surfaces (FSs) and reconstructed ones appear above Tc and much below Tc, respectively. We have observed mixing of these AMROs just below Tc in the CDW phase. Observed features strongly suggest magnetic breakdown in reconstructed FSs. In fact, they are reproduced by a quantum-mechanical model on AMROs under weak periodic potential. The possibility of the unconventional CDW, in which the CDW gap has nodal points on the Fermi surface, is excluded in this compound.

Original languageEnglish
Article number043714
JournalJournal of the Physical Society of Japan
Volume82
Issue number4
DOIs
StatePublished - Apr 2013

Keywords

  • Angle-dependent magnetoresistance oscillation
  • BEDT-TTF
  • Magnetic breakdown
  • Organic conductor
  • Unconventional charge density wave

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