Superconductivity in sulfur-based organic superconductors: A volume property
H. Schwenk, S. S. P. Parkin, V. Y. Lee, R. L. Greene
DOI 10.1103/PhysRevB.34.3156 · Physical Review B
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Abstract
We have shown by dc low-field magnetization measurements the existence of diamagnetic shielding and Meissner signals in the ambient-pressure organic superconductors, β-(ET)2IBr2 and β-(ET)2AuI2, below T=2.5 K and T=4.1 K, respectively [ET is bis(ethylenedithio)tetra- thiafulvalene]. This proves that superconductivity is a volume property in these compounds. We also measured the upper critical field Hc2 in the compound β-(ET)2AuI2. Combined with the low-field data this yields a thermodynamically consistent picture using Ginzburg-Landau theory and a weak-coupling Bardeen-Cooper-Schrieffer gap.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (ET)2IBr2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.5 | Pressure unresolved | onset |
| (ET)2AuI2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.1 | Pressure unresolved | onset |
| (ET)2ReO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2 | 0.4 GPa | unknown |
| (ET)2I3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.4 | Pressure unresolved | unknown |
| (ET)2I3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8 | 1.3 GPa | unknown |
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