Fermi-surface nesting in the organic conductor (BEDT-TTF)2TlHg(SCN)4

S. Uji, Hayuyoshi Aoki, M. Tokumoto, T. Kinoshita, N. Kinoshita, Y. Tanaka, H. Anzai

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

The Shubnikov-de Haas (SdH) measurements in the quasi-two-dimensional (2D) conductor (BEDT-TTF)2TlHg(SCN)4 have been performed to clarify the ground state. The SdH oscillations with frequencies of 663 and 4270 T are observed for H?b* above 10 T, which come from the closed orbit of the 2D Fermi surface and the magnetic-breakdown orbit, respectively. Below 3 T, three SdH oscillations with frequencies lower than 13 T are found. These low-frequency oscillations are interpreted to correspond to the small closed orbits caused by the nearly perfect nesting of the 1D Fermi surface. The results indicate that the ground state is a spin-density-wave state at low magnetic fields, but the nesting is removed by high magnetic fields. Two of the three low frequencies depend on temperature below 0.6 K. The observation shows that the Fermi surfaces change as temperature varies.

Original languageEnglish
Pages (from-to)732-735
Number of pages4
JournalPhysical Review B
Volume49
Issue number1
DOIs
Publication statusPublished - 1994 Jan 1

ASJC Scopus subject areas

  • Condensed Matter Physics

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