Kosterlitz-Thouless Transition and Short Range Spatial Correlations in an Extended Hubbard Model

Abstract

We study the competition between intersite and local correlations in a spinless two-band extended Hubbard model by taking an alternative limit of infinite dimensions. We find that the intersite density fluctuations suppress the charge Kondo energy scale and lead to a Fermi liquid to non-Fermi liquid transition for repulsive on-site density-density interactions. In the absence of intersite interactions, this transition reduces to the known Kosterlitz-Thouless transition. We show that a new line of non-Fermi liquid fixed points replace those of the zero intersite interaction problem.

11 pages, 2 figures

References in corpus (1)

• Non Fermi Liquid Behaviour near a $T=0$ spin-glass transition

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