PRESSURE-DEPENDENCE OF SUPERCONDUCTIVITY IN SIMPLE-CUBIC NA2CSC60

被引：39

作者：

MIZUKI, J

TAKAI, M

TAKAHASHI, H

MORI, N

TANIGAKI, K

HIROSAWA, I

PRASSIDES, K

机构：

[1] TOKYO DENKI UNIV,FAC ENGN,CHIYODA KU,TOKYO 101,JAPAN

[2] UNIV TOKYO,INST SOLID STATE PHYS,MINATO KU,TOKYO 106,JAPAN

[3] UNIV SUSSEX,SCH CHEM & MOLEC SCI,BRIGHTON BN1 9QJ,E SUSSEX,ENGLAND

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.50.3466

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The pressure dependence of the superconducting transition temperature T(c) of simple-cubic Na2CsC60 is studied by an ac susceptibility method with a Swenson-type piston-cylinder apparatus. The observed value of dT(c)/dP is - 12.5 +/- 0.2 K/GPa, significantly larger than the values of -7.8 and -9.7 K/GPa reported earlier for K3C60 and Rb3C60, respectively. Using the compressibility available (that of K3C60), we find that the evolution of T(c), with interfullerene spacing in Na2CSC60 is significantly different from that established for merohedrally disordered face-centered-cubic superconductors M3C60 (M=alkali metal), but in excellent agreement with the ambient pressure data for the simple cubic superconductors Na2RbC60 and Na2CsC60. The present results provide an additional dimension to the existing features of fulleride superconductors, establishing the importance of the relative orientation of C-60(3-) ions in affecting the electronic and conducting properties of these materials.

引用

页码：3466 / 3469

页数：4

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