Hubbard Model on Decorated Lattices

Batista, CD and Shastry, BS (2003) Hubbard Model on Decorated Lattices. In: Physcial Review Letters, 91 (11). p. 4.

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Abstract

We introduce a family of lattices for which the Hubbard model and its natural extensions can be quasiexactly solved, i.e., solved for the ground and low energy states. In particular, we show rigorously that the ground state of the Hubbard model with off-site Coulomb repulsions on a decorated Kagome lattice is an ordered array of local currents. The low energy theory describing this chiral state is an S=1/2 XY model, where each spin degree of freedom represents the two possible chiralities of each local current.

Item Type:	Journal Article
Publication:	Physcial Review Letters
Publisher:	The American Physical Society
Additional Information:	Copyright of this article belongs to The American Physical Society.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	12 Aug 2009 09:18
Last Modified:	19 Sep 2010 04:55
URI:	http://eprints.iisc.ac.in/id/eprint/17040

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