Speaker
Dr
Stefan Baur
(University of Cambridge)
Description
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.
Reference: S. K. Baur and N. R. Cooper, arXiv:1208.6540, to
be published in Phys. Rev. Lett.
Primary author
Dr
Stefan Baur
(University of Cambridge)
