https://doi.org/10.1140/epjb/e20020058
Intercalation and high temperature superconductivity of fullerides
1
Paul Scherrer Institute, Condensed Matter Theory, 5232 Villigen PSI, Switzerland
2
Lawrence Berkeley Laboratory, University of California at Berkeley, CA 94720, USA
Corresponding author: a abill@psi.ch
Received:
23
January
2002
Published online: 15 March 2002
Intercalation of polyatomic molecules into a superconductor can
drastically affect the properties of the compound. A mechanism
responsible for 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 ClBr
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
K.
PACS: 74.70.Wz – Fullerenes and related materials / 74.72.-h – High-Tc compounds
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002