Ferromagnetism in Hubbard Models

Preprint

18 August 1997

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9509063

Abstract

We present the first rigorous examples of non-singular Hubbard models which exhibit ferromagnetism at zero temperature. The models are defined in arbitrary dimensions, and are characterized by finite-ranged hoppings, dispersive bands, and finite on-site Coulomb interaction U. The picture, which goes back to Heisenberg, that sufficiently large Coulomb interaction can revert Pauli paramagnetism into ferromagnetism has finally been confirmed in concrete examples.

Keywords

EXHIBIT FERROMAGNETISM
COULOMB INTERACTION
RIGOROUS EXAMPLES
FERROMAGNETISM
HUBBARD MODELS
SINGULAR
CONCRETE
FINITE

All Related Versions

Version 1, 1995-09-12, ArXiv
Version 2, 1997-08-18, ArXiv
Published version: Physical Review Letters, 75 (25), 4678.

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