Electron Correlations in Molecular Systems

Details Electron Correlations in Molecular Systems Electron Correlations in Molecular Systems

1998-12-24

arxiv.org/abs/cond-mat/9812392v1

Mol. Phys. Rep. 25, 41 (1999)

Physics

Condensed Matter

Materials Science

9 pages, 4 figures, lecture given at the Conf. Molecular Crystals '98, Gdansk, Poland, September 9-12, 1998, to appear in Mole

Scientific paper

A short review of correlated electrons in molecular systems has been performed. Main attention has been focussed on ET salts, which are the d=2 systems. They show the Mott transition in high temperatures and the transition from the antiferromagnetic to the superconducting phase in low temperatures, under a (chemical) pressure. Physical properties (the electrical resistivity, the specific heat, the magnetic susceptibility, the photoemission spectra, the optical conductivity) of ET salts have been compared with those ones in other strongly correlated systems. The optical conductivity is described in the framework of the Hubbard model, with a low frequency peak as an evidence for the Abrikosov-Suhl resonance.

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