Specific heat of organic superconductor λ-(BEDT-TSF)2GaCl4

Y. Ishizaki, H. Uozaki, H. Tsuchiya, Y. Abe, E. Negishi, H. Matsui, S. Endo, Naoki Toyota

Research output: Contribution to journalConference articlepeer-review

14 Citations (Scopus)

Abstract

We have measured the specific heat of λ-(BEDT-TSF)2GaCl4 by a thermal relaxation method below 7 K to study the superconducting state. The specific heat jump due to the superconducting transition at Tc = 4.8 K is observed. For the normal state, we have determined the electronic specific heat coefficient γ = 14.4 ± 3.4 mJ/molK2 and the Debye temperature of ΘD = 194.0 ± 0.4 K. The discontinuity of the specific heat is evaluated to be ΔC/γTc = 1.37 ± 0.32, which coincides with a Bardeen-Cooper-Schrieffer (BCS) relation ΔC/γTc = 1.43 for a weak-coupling limit. The zero-crossing (ΔC = 0) occurs at 0.67 Tc, which has been similarly observed in BEDT-TTF-based superconductors.

Original languageEnglish
Pages (from-to)219-220
Number of pages2
JournalSynthetic Metals
Volume133-134
DOIs
Publication statusPublished - 2003 Mar 13
EventISCOM 2001 - Rusutsu, Hokkaido, Japan
Duration: 2001 Sep 102001 Sep 14

Keywords

  • Specific heat
  • Superconductor
  • Weak-couplin g superconductivity
  • λ-(BEDT-TSF)GaCl

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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