Metal-insulator transitions in three-component Falicov-Kimball model within coherent potential approximation

Nguyen Thi Huong, Le Duc Anh, Hoang Anh Tuan
Author affiliations

Authors

  • Nguyen Thi Huong Thuy Loi University, 175 Tay Son, Dong Da, Hanoi, Vietnam
  • Le Duc Anh Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, Vietnam
  • Hoang Anh Tuan Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi 11108, Vietnam

DOI:

https://doi.org/10.15625/0868-3166/17244

Keywords:

three-component Falicov-Kimball model, metal-insulator transition, coherent potential approximation

Abstract

We apply the coherent potential approximation to study the three-component Falicov - Kimball model, in which single-component and two-component fermionic particles are mixed in an optical lattice. In the model, the heavy single-component fermionic particles are localized while the light two-component fermionic particles can hop in the lattice. At half-filling, two transitions from an insulator via a metallic state to a Mott insulator are found with increasing the particle correlations. By contrast, at third-filling, only one transition from the metallic state to the Mott insulating phase is observed for strong repulsive interactions. Our results are consistent with those obtained by the dynamical mean field theory as well as by the slave boson mean field approach.

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References

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Published

03-11-2022

How to Cite

[1]
T. H. Nguyen, D. . A. Le and T. Hoang Anh, Metal-insulator transitions in three-component Falicov-Kimball model within coherent potential approximation, Comm. Phys. 33 (2022) 31. DOI: https://doi.org/10.15625/0868-3166/17244.

Issue

Vol. 33 No. 1 (2023)

Section

Papers

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Received 28-06-2022
Accepted 19-08-2022
Published 03-11-2022