Mott Transitions in the 2-band Hubbard Model: A Coherent Potential Approximation Study

Le Duc Anh, Hoang Anh Tuan
Author affiliations

Authors

  • Le Duc Anh Department of Physics, Hanoi National University of Education
  • Hoang Anh Tuan Institute of Physics, VAST

DOI:

https://doi.org/10.15625/0868-3166/22/3/2524

Abstract

The half-filled isotropic degenerate two-band Hubbard model is studied within coherent potential approximation. The model is characterized by an Ising-type Hund’s exchange coupling, intra- and inter-orbital Coulomb parameters. We found that the band degeneracy slightly reduces the Mott-Hubbard critical value \(U_C\). We reveal that the system can have two distinct critical values for Mott-Hubbard transitions.

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Published

31-10-2012

How to Cite

[1]
L. D. Anh and H. A. Tuan, “Mott Transitions in the 2-band Hubbard Model: A Coherent Potential Approximation Study”, Comm. Phys., vol. 22, no. 3, p. 223, Oct. 2012.

Issue

Vol. 22 No. 3 (2012)

Section

Papers

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