Phase diagram of the two-dimensional t-t' Falicov-Kimball model

Jacek Wojtkiewicz

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arXiv · cond-mat/0310043

Phase diagram of the two-dimensional t-t' Falicov-Kimball model

Jacek Wojtkiewicz

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Abstract

The ground-state phase diagram of two-dimensional Falicov-Kimball model with nearest-neighbour and next-nearest-neighbour hoppings (characterized by t,t' constants, respectively) has been studied in perturbative regime, i.e. in the case when on-site Coulomb interaction constant U is much larger than t,t' ones. The fourth-order phase diagram exhibits a rich structure, more complicated than for the ordinary Falicov-Kimball model. Possible experimental implications of the presence of nnn term are shortly discussed.

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Jacek Wojtkiewicz. 2003-10-17. Phase diagram of the two-dimensional t-t' Falicov-Kimball model. https://arxiv.org/abs/cond-mat/0310043

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