Journal of the Physical Society of Japan 85
, 104702 (2016)
ISSN: 0031-9015, SCI
Two-component Fermions in Optical Lattice with Spatially Alternating Interactions
Anh-Tuan Hoang, Thi-Hai-Yen Nguyen, Thi-Thu-Trang Tran, and Duc-Anh Le
We investigate two-component mass-imbalanced fermions in an optical lattice with spatially modulated interactions
by using two-site dynamical mean field theory. At half-filling and zero temperature, the phase diagram of the system is analytically obtained, in which the metallic region is reduced with increasing the mass imbalance. The ground-state properties of the fermionic system are discussed from the behaviors of both the spin-dependent quasi-particle weight at the Fermi level and the double occupancy for each sublattice as functions of the local interaction strengths for various values of the mass imbalance.