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Highly doped states of fullerene C 60 solids have been investigated. A single phase of binary Ba 4 C 60 was first synthesized and confirmed to be a noncubic ambient pressure superconductor. By cointercalation of alkali metals and Ba, an isostructural series of alkali-Ba-C 60 , ternaries have been synthesized. This new class of compounds allows us to vary the band-filling...
Here we report pressure dependence of Tc and lattice parameter of two types of fullerene superconductors with expanded unit cells. In trivalent complex fullerides (NH 3 ) x NaAA'C 60 (A,A′=K,Rb and Cs), chemical and physical pressure effects on Tc are considerably diferent. Similar deviations are observed in ternary superconductors A 3 Ba 3 C 60 . These...
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