Superconductivity in LixCsC60 fullerides

被引：59

作者：

Kosaka, M

Tanigaki, K

Prassides, K

Margadonna, S

Lappas, A

Brown, CM

Fitch, AN

机构：

[1] NEC Corp Ltd, Fundamental Res Labs, Tsukuba, Ibaraki 3058501, Japan

[2] Osaka City Univ, Fac Sci, Dept Mat Sci, Sumiyoshi Ku, Osaka 5588585, Japan

[3] Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England

[4] European Synchrotron Radiat Facil, F-38043 Grenoble, France

来源：

PHYSICAL REVIEW B | 1999年 / 59卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.59.R6628

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Superconductivity lost in Li2CsC60 is recovered when the t(1u) band is further filled through introduction of additional Li. Superconducting transition temperatures, T-c of 10.5 K and 8 K are observed for Li3CsC60 and Li4CsC60, respectively. The band filling of nonsuperconducting Li2CsC60 is established by Raman spectroscopy to be n=2.5, while that for superconducting Li3CsC60 is around n=3. These results indicate that appearance of superconductivity in alkali fullerides with stoichiometry A(3)C(60) is sensitively controlled by the filling of the r(1u) band and that n = 3 plays an especially important role. [S0163-1829(99)51210-1].

引用

页码：R6628 / R6630

页数：3