Direct Observation of Reconstructed Fermi Surfaces of (TMTSF)2ClO4 Utilizing the Third Angular Effect of Magnetoresistance

Harukazu Yoshino, Akihiro Oda, Takahiko Sasaki, Takeshi Hanajiri, Jun Ichi Yamada, Sin'ichi Nakatsuji, Hiroshi Anzai, Keizo Murata

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The organic superconductor, (TMTSF)2ClO4, is believed to have two kinds of quasi-one-dimensional (Q1D) Fermi surfaces in its anion ordered (R-) state below 24 K at ambient pressure. We succeeded for the first time in detecting each of the Fermi surfaces independently by utilizing the third angular effect of magnetoresistance of quasi-one-dimensional metals at 0.5 K and 20 T. From the width of the third angular effect anomaly (Δφ = 24 °), the gap induced by the ordered anions is estimated as Eg = 0.083ta, where ta is the transfer integral along the most conducting a-axis. The small Δφ and the rather large Eg. the latter of which is comparable to the transverse transfer integral, tb, suggest that the Q1D Fermi surfaces of (TMTSF)2ClO4 in the R-state are anomalously flat compared with that ol its analogs.

Original languageEnglish
Pages (from-to)3142-3145
Number of pages4
Journaljournal of the physical society of japan
Volume68
Issue number10
DOIs
Publication statusPublished - 1999 Oct

Keywords

  • Band structure
  • Magnetoresistance
  • Order-disorder transition
  • Organic superconductor
  • Quasi-one-dimensional
  • TMTSF

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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