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 nonmagnetic 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 nonmagnetic insulator in a very simple E circle times e Jahn-Teller model and we discuss its general properties in a more general context, also in connection with the insulating state of K4C60 and Rb4C60.

Nonmagnetic molecular Jahn-Teller Mott insulators / Fabrizio, Michele; Tosatti, E.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER. - ISSN 0163-1829. - 55:20(1997), pp. 13465-13472. [10.1103/PhysRevB.55.13465]

Nonmagnetic molecular Jahn-Teller Mott insulators

Fabrizio, Michele;
1997-01-01

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 nonmagnetic 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 nonmagnetic insulator in a very simple E circle times e Jahn-Teller model and we discuss its general properties in a more general context, also in connection with the insulating state of K4C60 and Rb4C60.
1997
55
20
13465
13472
Fabrizio, Michele; Tosatti, E.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/14298
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