Magnetic penetration depth in the organic superconductor κ-[BEDT-TTF]2Cu[NCS]2
D. R. Harshman, R. N. Kleiman, R. C. Haddon, S. V. Chichester-Hicks, M. L. Kaplan, L. W. Rupp, Jr., T. Pfiz, D. Ll. Williams, D. B. Mitzi
DOI 10.1103/PhysRevLett.64.1293 · Physical Review Letters
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Abstract
We report the first direct measurement of the effective magnetic penetration depth in oriented single crystals of κ-[BEDT-TTF]2Cu[NCS]2, with Tc(5 G)≊9 K. Results yield an effective in-plane value of λeffbc(0)≊9800 Å (for Hext≊3 kG), and a temperature dependence consistent with conventional s-wave pairing. Comparison with the London penetration depth, λL(0) (estimated to be ≊5100 Å), indicates a tendency toward dirty-limit superconductivity, with the ratio of coherence length over mean free path of ξ0bc/lbc≊2.7. From our results, it appears unnecessary to invoke any unconventional pairing schemes to explain the superconductivity in this material.
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. | 9 | Pressure unresolved | onset |
| (BEDT-TTF)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9 | Pressure not reported | unknown |
| (TMTSF)2ClO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1 | Pressure not reported | unknown |
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