Transport properties and structural features of the ambient-pressure superconductor κ′−(BEDT−TTF)2Cu[N(CN)2]Cl
V. N. Zverev, A. I. Manakov, S. S. Khasanov, R. P. Shibaeva, N. D. Kushch, A. V. Kazakova, L. I. Buravov, E. B. Yagubskii, E. Canadell
DOI 10.1103/PhysRevB.74.104504 · Physical Review B
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Abstract
The crystal structure and low-temperature transport properties of the recently synthesized κ′−(BEDT−TTF)2Cu[N(CN)2]Cl radical cation salt are investigated. The crystals exhibit metallic conductivity and are ambient-pressure superconductors with critical temperature in the range (11.3–11.9)K. The crystals show some distinctions in structure as compared to that of the Mott insulator κ−(BEDT−TTF)2Cu[N(CN)2]Cl: smaller size of the unit cell and deficiency in the occupancy of the copper positions. Anisotropy of superconducting properties as well as a nontrivial temperature dependence of the upper critical field were observed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| κ'-(BEDT-TTF)2Cu[N(CN)2]Cl Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11.6 | Pressure unresolved | midpoint |
| κ-(BEDT-TTF)2Cu[N(CN)2]Cl Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12.4 | 0.035 GPa | onset |
| κ-(BEDT-TTF)2Cu[N(CN)2]Br Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11.5 | Pressure unresolved | unknown |
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