Superconducting and normal-state properties of nonavalent fullerides
Y. Iwasa, M. Kawaguchi, H. Iwasaki, T. Mitani, N. Wada, T. Hasegawa
DOI 10.1103/PhysRevB.57.13395 · Physical Review B
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Abstract
We found that A3Ba3C60 (A=K,Rb,andCs) forms an isostructural series of compounds with a body-centered-cubic structure and tunable lattice parameter, while retaining the nominal molecular valence as C609−. In sharp contrast with the trivalent face-centered-cubic A3C60-type superconductors, the density of states at the Fermi energy and Tc decrease with increasing lattice parameter. Analysis by a phonon-mediated pairing model gives relevant parameters which considerably differ from those proposed for the A3C60 superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| K3Ba3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.6 | Pressure unresolved | onset |
| Rb3Ba3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2 | Pressure unresolved | onset |
| Cs3Ba3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure unresolved | unknown |
| K3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 19 | Pressure not reported | onset |
| Rb3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 29 | Pressure not reported | onset |
| Ca5C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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