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- Title
Metal–insulator transitions of fermionic mixtures with mass imbalance in disordered optical lattice.
- Authors
Hoang, Anh-Tuan; Nguyen, Thi-Hai-Yen; Le, Duc-Anh
- Abstract
We study the metal–insulator transitions in the half-filled Anderson–Hubbard model with mass imbalance by the typical medium theory using the equation of motion method as an impurity solver. The nonmagnetic ground state phase diagram of the system with mass imbalance is constructed numerically. In addition to the three phases showed up in the balanced case, the phase diagram of the mass imbalanced case contains a spin-selective localized phase, where one spin component is metallic while the other spin component is insulating. We find that if one increases the mass imbalance the metal region in the phase diagram is reduced, while both Anderson and Mott insulator regions are enlarged.
- Subjects
METAL-insulator transitions; OPTICAL lattices; PHASE diagrams; EQUATIONS of motion; TRANSITION metals
- Publication
Modern Physics Letters B, 2021, Vol 35, Issue 21, p1
- ISSN
0217-9849
- Publication type
Article
- DOI
10.1142/S0217984921503577