High-pressure study of a doped-type organic superconductor, κ-(BEDT-TTF) 4Hg 2.89Br 8

T. Okuhata, T. Nagai, H. Taniguchi, K. Satoh, T. Itou, Y. Shimizu, K. Miyagawa, Y. Ishii, N. Tajima, R. Kato

Research output: Contribution to journalArticlepeer-review


Physical properties of the organic charge-transfer complex that may be regarded as a doping system are presented. We measured resistivity of an ambient-pressure superconductor, κ-(BEDT-TTF) 4 Hg 2.89Br 8, as functions of temperature, magnetic field, and pressure. Metallic and superconducting states of this salt are possibly attributable to the doping effect, which originates from incommensurability of Hg chain because band structure calculation predicts strong electron-electron correlation enough to localize the itinerant electrons. We uncovered anomalous pressure and magnetic field dependences of superconductivity as well as non-Fermi liquid behavior in the normal-state resistivity at low pressures. In addition, we observed a pressure-induced crossover to the Fermi liquid behavior, which is seen in non-doped κ-type salts at any pressures.

Original languageEnglish
Pages (from-to)551-554
Number of pages4
JournalJournal of Low Temperature Physics
Issue number3-4
Publication statusPublished - 2006 Feb 1
Externally publishedYes


  • 71.10.Hf
  • 74.25.Dw
  • 74.25.Fy
  • 74.62.Fj

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics


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