Violation of the Luttinger sum rule within the Hubbard model on a triangular lattice

Details Violation of the Luttinger sum rule within the Hubbard model on a triangular lattice Violation of the Luttinger sum rule within the Hubbard model on a triangular lattice

2007-09-03

arxiv.org/abs/0709.0263v2

Eur. Phys. J. B 63, 431-435 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures

Scientific paper

10.1140/epjb/e2008-00264-0

The frequency-moment expansion method is developed to analyze the validity of the Luttinger sum rule within the Mott-Hubbard insulator, as represented by the generalized Hubbard model at half filling and large $U$. For the particular case of the Hubbard model with nearest-neighbor hopping on a triangular lattice lacking the particle-hole symmetry results reveal substantial violation of the sum rule.

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