Bulk superconducting specific-heat anomaly in β-di[bis (ethylenedithio) tetrathiafulvalene] diiodoaurate [β−(ET)2AuI2]
G. R. Stewart, J. M. Williams, H. H. Wang, L. N. Hall, M. T. Perozzo, K. D. Carlson
DOI 10.1103/PhysRevB.34.6509 · Physical Review B
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Abstract
In order to determine how universal the lack of a specific-heat anomaly at Tc is in the β−(ET)2X3 [β−(C10S8H8)2X3, where X3 is the linear anion] ambient-pressure organic superconductors [no anomaly has been found in β−(ET)2AuI2], we have measured the low-temperature specific heat of β−(ET)2AuI2, with Tc=5 K. Using a high-precision, low-addendum specific-heat platform we have found a distinct, although somewhat broadened, anomaly at Tc in β−(ET)2AuI2 indicative of bulk superconductivity. Also, CT (T→0) extrapolates, within the accuracy of our measurements, to zero, indicative of a fully opened gap in the electronic energy levels.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (C10S8H8)2AuI2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure unresolved | unknown |
| (C10S8H8)2AuI2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.88 | Pressure unresolved | onset |
| (C10S8H8)2I3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.5 | Pressure unresolved | unknown |
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