Mott Transitions of Three-Component Fermionic Atoms with Repulsive Interaction in Optical Lattices

Details Mott Transitions of Three-Component Fermionic Atoms with Repulsive Interaction in Optical Lattices Mott Transitions of Three-Component Fermionic Atoms with Repulsive Interaction in Optical Lattices

2010-06-09

arxiv.org/abs/1006.1685v1

Phys. Rev. A 82, 051602 (2010)

Physics

Condensed Matter

Quantum Gases

5 pages, 4 figures

Scientific paper

10.1103/PhysRevA.82.051602

We investigate the Mott transitions of three-component (colors) repulsive fermionic atoms in optical lattices using the dynamical mean field theory. We find that for SU(3) symmetry breaking interactions the Mott transition occurs at incommensurate half filling. As a result, a characteristic Mott insulating state appears, where paired atoms with two different colors and atoms with the third color are localized at different sites. We also find another Mott state where atoms with two different colors are localized at different sites and atoms with the third color remain itinerant. We demonstrate that these exotic Mott phases can be detected by experimental double occupancy observations.

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