The Superstructure of the Organic Superconductor β-(BEDT-TTF)2I3 under Pressure

Yoshio Nogami, Seiichi Kagoshima, Hiroyuki Anzai, Madoka Tokumoto, Nobumori Kinoshita, Nobuo Mori, Gunzi Saito

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


An X-ray diffraction study is made on the incommensurate superstructure in the organic superconductor β-(BEDT-TTF)2I3 under pressure. The onset temperature of the superstructure decreases from 175 K to 150 K with increasing pressure from 1 bar to about 400 bar, above which no superstructure is found. The wave vector specifying the superstructure is found to change in the range between 100 K and -120 K. This wave-vector change slows down at low pressures. At ambient pressure it takes more than 30 hr to complete the change. This wave-vector change is found to bring about a new “2 K superconducting state” in the title compound.

Original languageEnglish
Pages (from-to)259-265
Number of pages7
Journaljournal of the physical society of japan
Issue number1
Publication statusPublished - 1990
Externally publishedYes


  • incommensurate superstructure
  • organic superconductor
  • superstructure under pressure

ASJC Scopus subject areas

  • General Physics and Astronomy


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