Location of gap nodes in the organic superconductors κ-(ET) 2Cu(NCS)2 and κ-(ET)2Cu[N (CN) 2]Br determined by magnetocalorimetry

L. Malone*, O. J. Taylor, J. A. Schlueter, A. Carrington

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

29 Citations (Scopus)

Abstract

We report specific-heat measurements of the organic superconductors κ- (ET) 2 Cu (NCS) 2 and κ- (ET) 2 Cu [N (CN) 2] Br. When the magnetic field is rotated in the highly conducting planes at low temperature (T0.4K), we observe clear oscillations of specific heat which have a strong fourfold component. The observed strong field and temperature dependence of this fourfold component identifies it as originating from nodes in the superconducting energy gap which point along the in-plane crystal axes (dxy symmetry).

Original languageEnglish
Article number014522
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume82
Issue number1
DOIs
Publication statusPublished - 16 Jul 2010

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