High-pressure study up to 9.9 GPa of organic Mott insulator, β′-(BEDT-TTF)2AuCl2

Hiromi Taniguchi, Masashi Miyashita, Kenichi Uchiyama, Ryosuke Sato, Yasuyuki Ishii, Kazuhiko Satoh, Nobuo Môri, Masato Hedo, Yoshiya Uwatoko

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


We have investigated the resistivity of an organic Mott insulator, β′-(BEDT-TTF)2AuCl2, under extremely high pressures of up to 9.9 GPa, using the cubic anvil press, motivated by the fact that a related material, β′-(BEDT-TTF)2ICl2, shows the highest transition-temperature superconductivity among organics at 8.2 GPa. Through characterization by resistivity and susceptibility measurements at ambient pressure, we have confirmed that these two salts have common physical properties. Nevertheless, β′-(BEDT-TTF)2AuCl2 does not show superconductivity but remains semiconducting up to 9.9 GPa. We discuss the origin of these contrasting behaviors and suggest the cause to be the difference in anion size between the two salts.

Original languageEnglish
Pages (from-to)1370-1373
Number of pages4
Journaljournal of the physical society of japan
Issue number5
Publication statusPublished - 2005 May
Externally publishedYes


  • Crystal structure
  • Cubic anvil press
  • High pressure
  • Organic superconductor

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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