Low-temperature microwave surface impedance of the conventional organic superconductor κ-(BEDT-TTF)2Cu(NCS)2
M. Dressel, S. Bruder, G. Grüner, K. D Carlson, H. H. Wang, J. M. Williams
DOI 10.1103/PhysRevB.48.9906 · Physical Review B
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Abstract
We have performed measurements of the microwave surface impedance ZS=RS+iXS of the organic superconductor κ-(BEDT-TTF)2Cu(NCS)2 down to T=0.8 K. The reactance XS, and therefore the penetration depth λ, exhibits no temperature dependence for T≪Tc. This result is in full agreement with calculations of the BCS ground state and gives no indication of unconventional pairing. Furthermore, we have evaluated the complex conductivity σ^=σ1+iσ2 and find a pronounced peak in σ1 below Tc which can be identified as a coherence peak.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (BEDT-TTF)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.6 | Pressure not reported | unknown |
| (BEDT-TTF)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.6 | Pressure not reported | onset |
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