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Phase Diagram of the Two-dimensional t–t′ Falicov-Kimball Model

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Abstract

The ground-state phase diagram of the two-dimensional Falicov-Kimball model with nearest-neighbour and next-nearest-neighbour hoppings has been studied in the perturbative regime where hoppings are small compared with the on-site Coulomb interaction. The phase diagram at fourth-order exhibits a richer structure than the one of the ordinary Falicov-Kimball model.

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Authors and Affiliations

  1. Department for Mathematical Methods in Physics, Hoza 74, 00-682, Warsaw, Poland

    Jacek Wojtkiewicz

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  1. Jacek Wojtkiewicz
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PACS numbers: 71.10.Fd, 71.21.+a, 75.10.Hk, 75.30.Kz

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Wojtkiewicz, J. Phase Diagram of the Two-dimensional t–t′ Falicov-Kimball Model. J Stat Phys 123, 585–600 (2006). https://doi.org/10.1007/s10955-006-9054-6

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  • DOI: https://doi.org/10.1007/s10955-006-9054-6

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