Roles of spin fluctuation and frustration in the superconductivity of β-(BDA-TTP)2X (X=SbF6, AsF6) under uniaxial compression

Hiroshi Ito, Tetsuo Ishihara, Hisaaki Tanaka, Shin Ichi Kuroda, Takeo Suzuki, Seiichiro Onari, Yukio Tanaka, Jun Ichi Yamada, Koichi Kikuchi

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

β -type BDA-TTP [BDA-TTP=2,5 -bis(1,3-dithian-2-ylidene)-1,3,4,6- tetrathiapentalene] salts possess high transition temperatures TC reaching 7 K among organic superconductors. TC of β- (BDA-TTP) 2 X (X= SbF6, AsF6) is studied by resistive measurements under uniaxial compression. TC once increases and takes a maximum under compression parallel to the donor stack while it decreases under compression perpendicular to the donor stack. These results are in agreement with the half-filled Hubbard model on the triangular lattice in which the compression controls the spin fluctuation and frustration in the weak pressure region.

Original languageEnglish
Article number172506
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume78
Issue number17
DOIs
Publication statusPublished - Nov 14 2008

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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