Article Dans Une Revue Physical Review B: Condensed Matter (1978-1997) Année : 1993

Microwave surface impedance of κ-(BEDT-TTF)2Cu(NCS)2, where BEDT-TTF is bis(ethylenedithio)tetrathiafulvalene: Evidence for unconventional superconductivity

Résumé

High-sensitivity microwave-impedance measurements performed on the quasi-two-dimensional organic superconductor κ-(BEDT-TTF)2Cu(NCS)2 give sound evidence for an unconventional type of superconductivity. The penetration depth λ(T) is in excellent agreement with recent muon-spin-relaxation measurements which are consistent with anisotropic pairings with lines of nodes in the energy gap. The real part of the conductivity σ1 shows a peaked structure which is free of coherence factor effects and results from a competition between two temperature dependences, the penetration depth and the inelastic relaxation time of the normal fluid.

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hal-04944386 , version 1 (20-03-2025)

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D. Achkir, M. Poirier, C. Bourbonnais, G. Quirion, C. Lenoir, et al.. Microwave surface impedance of κ-(BEDT-TTF)2Cu(NCS)2, where BEDT-TTF is bis(ethylenedithio)tetrathiafulvalene: Evidence for unconventional superconductivity. Physical Review B: Condensed Matter (1978-1997), 1993, 47 (17), pp.11595-11598. ⟨10.1103/PhysRevB.47.11595⟩. ⟨hal-04944386⟩
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