Superfrustration of charge degrees of freedom

Details Superfrustration of charge degrees of freedom Superfrustration of charge degrees of freedom

2007-09-26

arxiv.org/abs/0709.4120v1

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 5 figures, contribution to the proceedings of the XXIII IUPAP International Conference on Statistical Physics (2007)

Scientific paper

10.1140/epjb/e2008-00150-9

We review recent results, obtained with P. Fendley, on frustration of quantum charges in lattice models for itinerant fermions with strong repulsive interactions. A judicious tuning of kinetic and interaction terms leads to models possessing supersymmetry. In such models frustration takes the form of what we call superfrustration: an extensive degeneracy of supersymmetric ground states. We present a gallery of examples of superfrustration on a variety of 2D lattices.

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