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

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

1996-06-13

arxiv.org/abs/cond-mat/9606087v1

Physics

Condensed Matter

11 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.77.3391

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.

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