An interpretation of the strain-sensitive resistance in κ-(BEDT-TTF)2Cu(NCS)2

Naoki Toyota, T. Sasaki, H. Satoh

Research output: Contribution to journalArticlepeer-review

Abstract

Recently Kang and co-workers (see ibid., vol.2, p.1665, 1990) reported that the electrical resistance of an organic superconductor kappa -(BEDT-TTF) 2Cu(NCS)2 noticeably decreases as a function of hydrostatic pressure; especially up to 1 kbar at 77.4 K where the resistance rapidly decreases by a factor of almost 10. These strain-sensitive resistance behaviours are consistently explained by the extended Hubbard model for a quarter-filling: an inter-site Coulomb repulsion is assumed to open an energy gap (300-500 K at room temperature) at the Fermi level and delicately interplay with the strain-sensitive transfer integrals of quasi-two-dimensional itinerant pi -electrons.

Original languageEnglish
Article number017
Pages (from-to)7241-7245
Number of pages5
JournalJournal of Physics: Condensed Matter
Volume2
Issue number34
DOIs
Publication statusPublished - 1990 Dec 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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