Superconductivity and pseudogap states in λ-(BEDT-TSF) 2 GaCl 4: Microwave conductivity measurements

T. Suzuki, E. Negishi, H. Uozaki, H. Matsui, N. Toyota

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We have investigated the 45 GHz microwave response from an organic superconductor λ-(BEDT-TSF) 2GaCl 4 with T c = 4.8 K. In the superconducting state, the London penetration depth saturates well below T c, which may provide an evidence for a conventional s-wave paring. In the metallic state, σ 1 c deviates downward from σ dc c, while σ 2 c, which should be zero in a conventional metallic state, increases exponentially toward T c. This anomalous metallic state has been discussed in terms of a possible formation of incoherent electron pairs in so-called a pseudogap state.

Original languageEnglish
Pages (from-to)571-575
Number of pages5
JournalJournal of Low Temperature Physics
Volume142
Issue number3-4
DOIs
Publication statusPublished - 2006 Feb

Keywords

  • 74.25.Nf
  • 74.70.Kn

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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