Magnetic field penetration depth of an organic superconductor: Evidence for anisotropic superconductivity of gapless nature
Kazushi Kanoda, Keishi Akiba, Kumi Suzuki, Toshihiro Takahashi, Gunzi Saito
DOI 10.1103/PhysRevLett.65.1271 · Physical Review Letters
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Abstract
The temperature dependence of the magnetic-field penetration depth λ of the organic superconductor κ-[bis(ethylenedithio)-tetrathiafulvalene]2Cu(NCS)2 has been determined by means of complex susceptibility measurements for single crystals. λ was found to follow a power law, λ(T)/λ(0)-1∝(T/Tc)2, at low temperatures instead of the exponential behavior expected from BCS theory. This result is considered as the first evidence for anisotropic superconductivity with nodes of the gap parameter on the Fermi surface 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. | 9.2 | 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. | 10.4 | Pressure not reported | unknown |
| (TMTSF)2PF6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| (TMTSF)2ClO4 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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