Abstract
The Hubbard model on 3-dimensionalsc lattice with an attractive or repulsive on site interaction, augmented by a renulsive nearest neighbour interaction and its atomic limit are studied using the method of infrared bounds. Conditions upon interactions for the existence of a temperature driven phase transition to so called charge ordered phase are derived. A lower bound in terms of interactions for the corresponding critical temperature is calculated.
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Jędrzejewski, J. Electron charge ordering in the extended Hubbard model. Z. Physik B - Condensed Matter 48, 219–225 (1982). https://doi.org/10.1007/BF01420583
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DOI: https://doi.org/10.1007/BF01420583