Ruprecht-Karls-Universität Heidelberg
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Andreas Mielke
Institut für Theoretische Physik
Ruprecht-Karls Universität
Philosophenweg 19
D-69120 Heidelberg
Germany
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e-mail: mielke@tphys.uni-heidelberg.de


Andreas Mielke: Ferromagnetism in single band Hubbard models with a partially flat band
Phys. Rev. Lett.82, 4312-4315 (1999) .

Archiv: cond-mat/9904258

Abstract

A Hubbard model with a single, partially flat band has ferromagnetic ground states. It is shown that local stability of ferromagnetism implies its global stability in such a model: The model has only ferromagnetic ground states if there are no single spin-flip ground states. Since a single-band Hubbard model away from half filling describes a metal, this result may open a route to metallic ferromagnetism in single band Hubbard models.

BibTeX-Eintrag

@article{Mielke1999a,
author="Andreas Mielke",
title="Ferromagnetism in single band Hubbard models with a partially flat band",
journal="Phys. Rev. Lett.",
volume="82",
pages="4312-4315",
year="1999"
}

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Letzte Änderung: 15.11.2017. mielke@tphys.uni-heidelberg.de