Superconductivity of β-type salts under uniaxial compression

Hiroshi Ito, Tetsuo Ishihara, Masafumi Niwa, Takeo Suzuki, Seiichiro Onari, Yukio Tanaka, Jun Ichi Yamada, Hideki Yamochi, Gunzi Saito

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We studied the superconducting transition temperature TC of β-(BEDT-TTF)2I3 in the high-TC phase under uniaxial strain. By embedding the crystal into epoxy resin, 8 K superconducting phase is stabilized. By applying uniaxial compression, further TC increase taking a maximum at a piston pressure of 3-4 kbar is observed for both directions parallel and perpendicular to the donor stack. The behavior is understood as a competition between the electron correlation (U dimer/W) and spin frustration (t'/t) in terms of the spin-fluctuation mediated superconductivity on the dimerized triangular lattice Hubbard model.

Original languageEnglish
Pages (from-to)S262-S264
JournalPhysica B: Condensed Matter
Volume405
Issue number11 SUPPL.
DOIs
Publication statusPublished - Jun 1 2010

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Keywords

  • Dimerization
  • Spin frustration
  • Superconductivity
  • Uniaxial strain
  • β-type BEDT-TTF salt

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Ito, H., Ishihara, T., Niwa, M., Suzuki, T., Onari, S., Tanaka, Y., Yamada, J. I., Yamochi, H., & Saito, G. (2010). Superconductivity of β-type salts under uniaxial compression. Physica B: Condensed Matter, 405(11 SUPPL.), S262-S264. https://doi.org/10.1016/j.physb.2009.12.073