Jahn-Teller and Coulomb correlations in fullerene ions and compounds : from isolated ions to metal, insulator, and superconductor phases of alkali fulleride solids
Libro
Data di Pubblicazione:
2010
Citazione:
Jahn-Teller and Coulomb correlations in fullerene ions and compounds : from isolated ions to metal, insulator, and superconductor phases of alkali fulleride solids / N. Manini, E. Tosatti. - Saarbrucken : Lambert Academic Publishing, 2010. - ISBN 978-3-8383-6024-9.
Abstract:
We offer a partial review of some theoretical aspects of the interplay among
strong electron-electron Coulomb plus exchange correlations and Jahn-Teller
vibronic phenomena in fullerene ions and in solid conductors, superconductors, insulators. The first half of this work covers molecular fullerene ions, their intra-molecular Jahn-Teller effect, Coulomb exchange (Hund's rule) interactions, and
molecular vibronic spectroscopies. Several aspects, calculations, and phenomena are discussed also in connection with spectroscopic data. The second part addresses intermolecular electron motion in
molecular solid fullerides, with special emphasis given to trivalent cases such as
K3C60 and NH3 K3C60, where metallic, superconducting and Mott insulating phases are at play. Dynamical mean field theory
approaches to simplified Hamiltonians for this system are discussed in the light of some of the observed phenomenology. In particular NH3 K3C60 and the more recently studied cubic Cs3C60 compounds are discussed as realizations of Mott-Jahn-Teller insulators, which, under pressure, turn into strongly correlated superconductors, sharing several important elements with the cuprate superconductors.
Tipologia IRIS:
05 - Volume
Keywords:
fullerene C60
Elenco autori:
N. Manini, E. Tosatti
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