kappa-(BEDT-TTF)_2Cu[N(CN)_2]Br: a Fully Gapped Strong-Coupling Superconductor

H. Elsinger; J. Wosnitza; S. Wanka; J. Hagel; D. Schweitzer; W. Strunz

doi:10.1103/PhysRevLett.84.6098

kappa-(BEDT-TTF)_2Cu[N(CN)_2]Br: a Fully Gapped Strong-Coupling Superconductor

Superconductivity 2009-10-31 v1

Authors: H. Elsinger , J. Wosnitza , S. Wanka , J. Hagel , D. Schweitzer , W. Strunz

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Abstract

High-resolution specific-heat measurements of the organic superconductor kappa-(BEDT-TTF)_2Cu[N(CN)_2]Br in the superconducting (B = 0) and normal (B = 14 T) state show a clearly resolvable anomaly at Tc = 11.5 K and an electronic contribution, Ces, which can be reasonably well described by strong-coupling BCS theory. Most importantly, Ces vanishes exponentially in the superconducting state which gives evidence for a fully gapped order parameter.

Keywords

organic superconductor specific heat strong-coupling BCS theory fully gapped kappa-(BEDT-TTF)2Cu[N(CN)2]Br

Cite

@article{arxiv.cond-mat/9912031,
  title  = {kappa-(BEDT-TTF)_2Cu[N(CN)_2]Br: a Fully Gapped Strong-Coupling Superconductor},
  author = {H. Elsinger and J. Wosnitza and S. Wanka and J. Hagel and D. Schweitzer and W. Strunz},
  journal= {arXiv preprint arXiv:cond-mat/9912031},
  year   = {2009}
}

Comments

4 pages, 4 figures

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