The specific heat of the two-dimensional organic superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br

Authors
Wosnitza, J Elsinger, H Hagel, J Wanka, S Schweitzer, D
Citation
J. Wosnitza et al., The specific heat of the two-dimensional organic superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br, SYNTH METAL, 120(1-3), 2001, pp. 705-706
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SYNTHETIC METALS
ISSN journal
03796779 → ACNP
Volume
120
Issue
1-3
Year of publication
2001
Pages
705 - 706
Database
ISI
SICI code
0379-6779(20010315)120:1-3<705:TSHOTT>2.0.ZU;2-O
Abstract
We report on high-resolution specific-heat measurements of the organic supe rconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br in different magnetic fields u p to 14 T where the material is in the normal state. The data can reasonabl y well be described by strong-coupling BCS theory. In contrast to previous results suggesting nodes of the order parameter, the electronic contributio n of the specific heat for B = 0 vanishes exponentially towards low tempera tures giving clear evidence for a fully-gapped order parameter.