Physics – Condensed Matter – Superconductivity
Scientific paper
2001-09-28
Eur.Phys.J.B 26, 3 (2002)
Physics
Condensed Matter
Superconductivity
Final expanded version of cond-mat/0109553 and cond-mat/0110327 with Journal reference
Scientific paper
10.1140/epjb/e20020058
Intercalation of polyatomic molecules into a superconductor can drastically affect the properties of the compound. A mechanism leading to a large increase in Tc for such systems is proposed. It explains the recent remarkable observation of high Tc superconductivity in the hole-doped C60/CHX3 (X=Cl,Br) compounds and the large shift in their Tc upon Cl->Br substitution. The increase in Tc is due to contribution to the pairing arising from the interaction of electrons with the vibrational manifold of the molecule. The proposed mechanism opens up the possibility to observe a site-selective isotope effect. We also suggest that intercalating CHI3 would further increase the critical temperature to Tc=140K.
Bill Andreas
Kresin Vladimir Z.
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