Superconducting phase sequence in RxC60 fullerides (R=Sm and Yb)
Superconducting phase sequence in RxC60 fullerides (R=Sm and Yb)
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DOI：
10.1103/physrevb.73.094509
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发表时间：
2006-03-01
影响因子：
3.7
通讯作者：
Tanigaki, K
中科院分区：
文献类型：
--
作者：
Akada, M;Hirai, T;Tanigaki, K
稀土C-60富勒烯RxC_（60）（R=Yb和Sm）中的真正超导相不是以前报道的R_（2.75）C_（60）。Sm-C-60富勒烯化合物没有超导电性。Yb-C-60富勒烯和Sm-C-60富勒烯之间的相序列作为插入剂浓度的函数的x被示出是非常不同的，虽然Yb和Sm是具有二价态的稀土元素的同一家族。这可以解释SmxC_（60）超导性的丧失，并暗示了真正的超导相。描述了稀土C-60富勒烯的全貌。
The true superconducting phase in rare-earth C-60 fullerides RxC60 (R=Yb and Sm) is not R2.75C60 previously reported. Moreover, no superconductivity is observed in Sm-C-60 fullerides. The phase sequence between Yb-C-60 fullerides and Sm-C-60 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 C-60 fullerides is described.