Author/Authors :
Takenobu، نويسنده , , T. and Shimoda، نويسنده , , H. and Iwasa، نويسنده , , Y. and Mitani، نويسنده , , T. and Murayama، نويسنده , , C. and Môri، نويسنده , , N. and Ishii، نويسنده , , K and Suematsu، نويسنده , , H، نويسنده ,
Abstract :
Here we report pressure dependence of Tc and lattice parameter of two types of fullerene superconductors with expanded unit cells. In trivalent complex fullerides (NH3)xNaAAʹC60 (A,A′=K,Rb and Cs), chemical and physical pressure effects on Tc are considerably diferent. Similar deviations are observed in ternary superconductors A3Ba3C60. These finding contrast in a striking way with the empirical rule, implying that, in the large interfullerene distance regime, Tc is not controlled simply by lattice parameters.
