Anisotropic three-dimensional superconductivity of the incommensurate organic superconductor (MDT-ST)(I3)0.417

Tadashi Kawamoto, Takehiko Mori, Taichi Terashima, Shinya Uji, Ayumi Takamori, Kazuo Takimiya, Tetsuo Otsubo

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8 Citations (Scopus)


Superconducting properties are investigated for the incommensurate ambient pressure organic superconductor (MDT-ST)(I3)0.417 [MDT-ST: 5H-2-(1,3-dithiol-2-ylidene)-1,3-diselena-4,6-dithiapentalene, Tc = 4.3 K]. The upper critical fields show anisotropic three-dimensional angle dependence in contrast to the highly two-dimensional one. Although the coherence lengths are highly anisotropic ξ∥c∥b: ξ∥a ∼ 1:8:11, the interlayer coherence length, ξ∥c, is much longer than the thickness of the conducting sheet. These results indicate that the present compound is a highly anisotropic three-dimensional superconductor among the layered organic superconductors. The superconducting transition widths in the conducting plane exhibit anomalous decreases with decreasing temperature, suggesting that the flux-lines are pinned by infinite anion chains.

Original languageEnglish
Pages (from-to)1529-1533
Number of pages5
JournalJournal of the Physical Society of Japan
Issue number5
Publication statusPublished - 2005 May


  • Coherence length
  • Incommensurate crystal
  • Organic superconductor
  • Three dimensionality
  • Upper critical field


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