Specific heat in high magnetic field of κ-di[bis(ethylenedithio)tetrathiafulvalene]- di(thiocyano)cuprate [κ-(ET)2Cu(NCS)2]: Evidence for strong-coupling superconductivity
B. Andraka, J. S. Kim, G. R. Stewart, K. D. Carlson, H. H. Wang, J. M. Williams
DOI 10.1103/PhysRevB.40.11345 · Physical Review B
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Abstract
We have measured the specific heat down to 1.5 K of a collection of high-quality single crystals of κ-(ET)2Cu(NCS)2 in fields parallel to the crystalline a* direction to 12.5 T. In this first determination of γ, we find γ to be 25±3 mJ/K2 mole. The anomaly in C at Tc is quite distinct when compared to normal-state data obtained by suppressing Tc with field. The value of ΔC/γT>2 obtained implies that this organic superconductor has strong coupling.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (ET)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.1 | Pressure not reported | midpoint |
| (ET)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11.5 | Pressure not reported | onset |
| (ET)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.4 | Pressure not reported | onset |
| (ET)2I3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.5 | Pressure not reported | unknown |
| (ET)2AuI2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.9 | Pressure not reported | unknown |
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