Batista, C. D. ; Shastry, B. S. (2003) Hubbard model on decorated lattices Physical Review Letters, 91 (11). 116401_1-116401_4. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v91/i11/e116401
Related URL: http://dx.doi.org/10.1103/PhysRevLett.91.116401
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 Kagomè lattice is an ordered array of local currents. The low energy theory describing this chiral state is an S=½ XY model, where each spin degree of freedom represents the two possible chiralities of each local current.
Item Type: | Article |
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Source: | Copyright of this article belongs to The American Physical Society. |
ID Code: | 50793 |
Deposited On: | 26 Jul 2011 12:37 |
Last Modified: | 18 May 2016 04:57 |
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