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

Le Duc Anh, Hoang Anh Tuan

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.

Full Text:

PDF


DOI: https://doi.org/10.15625/0868-3166/22/3/2524 Display counter: Abstract : 160 views. PDF : 56 views.

Refbacks

  • There are currently no refbacks.




Editorial Office:

Communications in Physics

1st Floor, A16 Building, 18B Hoang Quoc Viet Street, Cau Giay District, Hanoi, Vietnam

Tel: (+84) 024 3791 7102 

Email: cip@vjs.ac.vn

Copyright by