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- W2023488993 abstract "We study the effects of correlated hopping in the two-dimensional (2D) Falicov-Kimball model by means of an extension of the dynamical mean-field approximation (DMFA). The extension is based on the projection technique and the DMFA, in which nonlocal correlations are taken into account through static quantities of a relevant subspace. The effect of the correlated hopping is to introduce nonlocal self-energy components which remain even at D→∞. We show that the sum rules of the spectral function and its moments are preserved. The spectral function obtained reveals significant nonlocal contributions which are absent in the DMFA." @default.
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- W2023488993 date "2001-05-31" @default.
- W2023488993 modified "2023-09-28" @default.
- W2023488993 title "Correlated hopping in the Falicov-Kimball model: a dynamical mean-field study" @default.
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- W2023488993 doi "https://doi.org/10.1088/0953-8984/13/24/307" @default.
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