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Violation of the Luttinger sum rule within the Hubbard model on a triangular lattice |
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| Authors: | J. Kokalj P. Prelovšek |
| Affiliation: | (1) J. Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia;(2) Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana, Slovenia |
| Abstract: | 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. |
| Keywords: | PACS 71.10.-w Theories and models of many-electron systems 71.27.+a Strongly correlated electron systems heavy fermions 71.18.+y Fermi surface: calculations and measurements effective mass, g factor |
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