Thermodynamic and Transport Measurements of Superconducting Na0.3CoO2·1.3H2O Single Crystals Prepared by Electrochemical Deintercalation
F. C. Chou, J. H. Cho, P. A. Lee, E. T. Abel, K. Matan, Y. S. Lee
DOI 10.1103/PhysRevLett.92.157004 · Physical Review Letters
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Abstract
Superconducting single crystal samples of Na0.3CoO2·1.3H2O have been produced using an electrochemical technique which dispenses with the usual bromine chemical deintercalation method. In fully hydrated crystals, susceptibility and specific heat measurements confirm that bulk superconductivity has been achieved. The extracted normal state density of states indicates Fermi-liquid behavior with strong mass enhancement and a modest Wilson ratio. Measurements of Hc2 for H∥c and H∥ab reveal significant anisotropy, and the extracted value for the coherence length is about 100 Å, consistent with an extremely narrow bandwidth.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Na0.3CoO2·1.3H2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.2 | Pressure not reported | onset |
| Na0.3CoO2·1.3H2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.2 | Pressure not reported | midpoint |
| Na0.3CoO2·1.3H2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.2 | Pressure not reported | zero_resistance |
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