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Physica B Condensed Matter

Non-Fermi liquid and Mott transition in the multi-channel two-band Hubbard model in infinite dimensions

Yoshiaki Ōno, Atsushi Tsuruta, Tamifusa Matsuura, Yoshihiro Kuroda

Published Jun 1, 2000• 1 citation
Publisher
DOI
10.1016/s0921-4526(99)00924-2

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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.