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: Exact ground states for the Hubbard model on the kagomé lattice
J. Phys. A: Math. Gen.25, 4335-4345 (1992) .

Abstract

The author gives a complete and rigorous description of the ground states of the Hubbard model on the Kagome lattice for electron densities n>or=5/3 and U>0. If 11/6>n>or=5/3 the system shows a ferromagnetic behaviour at zero temperature. If n is above 11/6 the system is paramagnetic. The proof of these results uses some graph-theoretic methods. The results are applicable to all line graphs of planar lattices, of which the Kagome lattice is an example.

BibTeX-Eintrag

@article{Mielke1992a,
author="Andreas Mielke",
title="Exact ground states for the Hubbard model on the kagomé lattice",
journal="J. Phys. A: Math. Gen.",
volume="25",
pages="4335-4345",
year="1992"
}

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