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arXiv · 1208.6540

Coupled Ferromagnetic and Nematic Ordering of Fermions in an Optical Flux Lattice

Stefan K. Baur·Nigel R. Cooper
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Abstract

Ultracold atoms in Raman-dressed optical lattices allow for effective momentum-dependent interactions among single-species fermions originating from short-range s-wave interactions. These dressed-state interactions combined with very flat bands encountered in the recently introduced optical flux lattices push the Stoner instability towards weaker repulsive interactions, making it accessible with current experiments. As a consequence of the coupling between spin and orbital degrees of freedom, the magnetic phase features Ising nematic order.

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Stefan K. Baur, Nigel R. Cooper. 2013-01-07. Coupled Ferromagnetic and Nematic Ordering of Fermions in an Optical Flux Lattice. https://doi.org/10.1103/physrevlett.109.265301

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