Color-selective Mott transition and color superfluid of three-component fermionic atoms with repulsive interaction in optical lattices

Abstract

We investigate quantum phase transitions of three-component (colors) repulsive fermionic atoms in optical lattices, using dynamical mean field theory. For the isotropic interaction system, a Mott transition occurs at commensurate 1/3 and 2/3 fillings, while the system remains a Fermi liquid at incommensurate other filling. For the anisotropic interaction system, we find that at half-filling there occur a color-selective Mott transition and a color superfluid transition driven by the repulsive interaction.