Magnetic Determination of Ginzburg-Landau Coherence Length for Organic Superconductor k-(BEDT-TTF)2X (X = Cu(NCS)2, Cu[N(CN)2]Br): Effect of Isotope Substitution

Hiroshi Ito, Masashi Watanabe, Yoshio Nogami, Takehiko Ishiguro, Tokutaro Komatsu, Gunzi Saito, Nobuyoshi Hosoito

Research output: Contribution to journalArticlepeer-review

63 Citations (Scopus)

Abstract

The Ginzburg-Landau coherence lengths are determined from the temperature dependence of the magnetization by fitting measured results with the renormalization theory of the fluctuation developed for layered superconductors. The derived interlayer coherence lengths are 6±2Å and 3.2±0.5Å for k-(BEDT-TTF)2Cu-[N(CN)2]Br and k-(BEDT-TTF)2Cu(NCS)2, respectively, which are remarkably shorter than the interlayer spacing. It is also found that these coherence lengths are virtually unaffected by isotope substitution in BEDT-TTF molecules.

Original languageEnglish
Pages (from-to)3230-3233
Number of pages4
Journaljournal of the physical society of japan
Volume60
Issue number10
DOIs
Publication statusPublished - Oct 1991
Externally publishedYes

Keywords

  • GL coherence length
  • diamagnetism
  • isotope effect
  • organic superconductor
  • superconductivity fluctuation
  • two-dimensionality

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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