Magnetic Penetration Depth of κ−(BEDT−TTF)2Cu(NCS)2 Strong Evidence for Conventional Cooper Pairing
M. Lang, N. Toyota, T. Sasaki, H. Sato
DOI 10.1103/PhysRevLett.69.1443 · Physical Review Letters
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Abstract
We report on dc magnetization measurements of high-quality single crystals of the title organic super-conductor. The temperature dependence of the magnetic penetration depth is estimated from the slope of the linear M(lnH) dependence in the London regime. An excellent agreement with the BCS theory for a weak-coupling superconductor in the clean limit is found. An attempt is made to relate the mixed-state-derived penetration depth, γ(T→0)=535±20 mm, to normal-state Fermi-surface parameters. The strongly correlated heavy carriers appear to be of crucial importance to explain superconductivity in this material.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| κ-(BEDT-TTF)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.15 | Pressure not reported | onset |
| κ-(BEDT-TTF)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.11 | Pressure not reported | midpoint |
| κ-(BEDT-TTF)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.13 | Pressure not reported | midpoint |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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