Quantum magnetism and counterflow supersolidity of up-down bosonic dipoles

Details Quantum magnetism and counterflow supersolidity of up-down bosonic dipoles Quantum magnetism and counterflow supersolidity of up-down bosonic dipoles

2010-03-29

arxiv.org/abs/1003.5591v2

New J. Phys. 12 (2010) 093008

Physics

Condensed Matter

Other Condensed Matter

8 pages, 6 figures

Scientific paper

We study a gas of dipolar Bosons confined in a two-dimensional optical lattice. Dipoles are considered to point freely in both up and down directions perpendicular to the lattice plane. This results in a nearest neighbor repulsive (attractive) interaction for aligned (anti-aligned) dipoles. We find regions of parameters where the ground state of the system exhibits insulating phases with ferromagnetic or anti-ferromagnetic ordering, as well as with rational values of the average magnetization. Evidence for the existence of a novel counterflow supersolid quantum phase is also presented.

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