Non magnetic molecular Jahn-Teller Mott insulators
Abstract
Narrow-band conductors may turn insulating and magnetic as a consequence of strong electron-electron correlation. In molecular conductors, the concomitance of a strong Jahn-Teller coupling may give rise to the alternative possibility of a non-magnetic insulator, with or without a static cooperative Jahn-Teller distortion. In the latter case the insulator has Mott-like properties, with an interesting interplay between electron-electron repulsion and the Jahn-Teller effect, which is dynamical. We study this kind of non-magnetic insulator in a very simple Jahn-Teller model and we discuss its general properties in a more general context, also in connection with the insulating state of K_{4}C_{60} and Rb_{4}C_{60}.
Keywords
Cite
@article{arxiv.cond-mat/9702079,
title = {Non magnetic molecular Jahn-Teller Mott insulators},
author = {Michele Fabrizio and Erio Tosatti},
journal= {arXiv preprint arXiv:cond-mat/9702079},
year = {2009}
}
Comments
21 pages, Revtex, one included figure with epsfig.sty