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arxiv: cond-mat/9912031 · v1 · submitted 1999-12-02 · ❄️ cond-mat.supr-con

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 This is my paper
classification ❄️ cond-mat.supr-con
keywords bedt-ttffullygappedkappa-statestrong-couplingsuperconductingsuperconductor
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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.

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