High-resolution ac-calorimetry studies on κ-(ET)2Cu(NCS)2: A strong-coupling superconductor with finite energy gap

J. Müller, M. Lang, R. Helfrich, F. Steglich, T. Sasaki

Research output: Contribution to journalConference articlepeer-review

Abstract

We report high-resolution heat capacity measurements on κ-(ET)2Cu(NCS)2 utilising an ac-modulation technique. The quasi-particle contribution to the specific heat in the superconducting state, Ces, can be well described by a strong-coupling BCS model implying an exponentially weak temperature dependence at T ≪ Tc. This result rules out an order parameter with zeroes on the Fermi surface.

Original languageEnglish
Pages (from-to)235-237
Number of pages3
JournalSynthetic Metals
Volume133-134
DOIs
Publication statusPublished - 2003 Mar 13
EventISCOM 2001 - Rusutsu, Hokkaido, Japan
Duration: 2001 Sep 102001 Sep 14

Keywords

  • BEDT-TTF salt
  • Organic superconductors
  • Specific heat

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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