Superconducting phase sequence in RxC60 fullerides (R=Sm and Yb)
Misaho Akada, Toshinari Hirai, Junji Takeuchi, Takao Yamamoto, Ryotaro Kumashiro, Katsumi Tanigaki
DOI 10.1103/PhysRevB.73.094509 · Physical Review B
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Abstract
The true superconducting phase in rare-earth C60 fullerides RxC60 (R=Yb and Sm) is not R2.75C60 previously reported. Moreover, no superconductivity is observed in Sm−C60 fullerides. The phase sequence between Yb−C60 fullerides and Sm−C60 ones as a function of the intercalant concentration of x is shown to be greatly different, although Yb and Sm are the same family of rare-earth elements with the divalent valence state. This can explain the loss of superconductivity in SmxC60 and suggests the true superconducting phase. The whole picture of rare-earth C60 fullerides is described.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Yb2.75C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Sm2.75C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YbxC60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| SmxC60 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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