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, Yasuyuki Ishii, N. Tajima, R. Kato

Research output: Contribution to journalArticle

Abstract

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
Volume142
Issue number3-4
DOIs
Publication statusPublished - 2006 Feb
Externally publishedYes

Fingerprint

organic superconductors
Superconducting materials
salts
electrical resistivity
electrons
Fermi liquids
Salts
Doping (additives)
pressure distribution
magnetic fields
Magnetic fields
Electron correlations
crossovers
superconductivity
low pressure
Electrons
physical properties
charge transfer
Superconductivity
Band structure

Keywords

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

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Okuhata, T., Nagai, T., Taniguchi, H., Satoh, K., Itou, T., Shimizu, Y., ... Kato, R. (2006). High-pressure study of a doped-type organic superconductor, κ-(BEDT-TTF) 4Hg 2.89Br 8 Journal of Low Temperature Physics, 142(3-4), 551-554. https://doi.org/10.1007/s10909-006-9162-3

High-pressure study of a doped-type organic superconductor, κ-(BEDT-TTF) 4Hg 2.89Br 8 . / Okuhata, T.; Nagai, T.; Taniguchi, H.; Satoh, K.; Itou, T.; Shimizu, Y.; Miyagawa, K.; Ishii, Yasuyuki; Tajima, N.; Kato, R.

In: Journal of Low Temperature Physics, Vol. 142, No. 3-4, 02.2006, p. 551-554.

Research output: Contribution to journalArticle

Okuhata, T, Nagai, T, Taniguchi, H, Satoh, K, Itou, T, Shimizu, Y, Miyagawa, K, Ishii, Y, Tajima, N & Kato, R 2006, 'High-pressure study of a doped-type organic superconductor, κ-(BEDT-TTF) 4Hg 2.89Br 8 ', Journal of Low Temperature Physics, vol. 142, no. 3-4, pp. 551-554. https://doi.org/10.1007/s10909-006-9162-3
Okuhata, T. ; Nagai, T. ; Taniguchi, H. ; Satoh, K. ; Itou, T. ; Shimizu, Y. ; Miyagawa, K. ; Ishii, Yasuyuki ; Tajima, N. ; Kato, R. / High-pressure study of a doped-type organic superconductor, κ-(BEDT-TTF) 4Hg 2.89Br 8 In: Journal of Low Temperature Physics. 2006 ; Vol. 142, No. 3-4. pp. 551-554.
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