Rubidium isotope effect in superconducting Rb3C60
B. Burk, Vincent H. Crespi, A. Zettl, Marvin L. Cohen
DOI 10.1103/PhysRevLett.72.3706 · Physical Review Letters
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Abstract
We have measured the resistive supercondeucting transition temperature in C60 single crystals intercalated with isotopically pure Rb87 and Rb85 and with natural abundance rubidium. We obtain a rubidium isotope effect exponent of αRb=-0.028±0.036, a result which implies that the Rb-C60 optic phonons play at most a minor role in the pairing mechanism of Rb3C60.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Rb3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30.82 | Pressure not reported | onset |
| K3C60 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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