21 January 2013 to 15 February 2013
Nordita
Europe/Stockholm timezone

Hall conductivity in spin-orbit coupled bosonic Mott insulator

8 Feb 2013, 15:30
30m
132:028 (Nordita)

132:028

Nordita

Speaker

Dr Clement Wong (Utrecht University)

Description

We study the Hall conductivity in a spin-orbit coupled bosonic Mott insulator. Using a strong-coupling perturbation theory, we show that in the spinful Bose Hubbard model, interactions can induce momentum-space Berry curvature, leading to the anomalous Hall phase. Furthermore, we find that the ground state can in principle support an integer Hall conductivity, i.e., the quantum anomalous Hall phase, if the sum of the Chern numbers of the hole bands is nonzero. For the abelian spin-orbit coupled Bose gas that has been achieved in cold atom experiments, we propose some experimental signatures of the interaction induced Berry curvature. Our results have implications for topological transport in the Mott-insulating phases with textured magnetic order.

Primary author

Dr Clement Wong (Utrecht University)

Presentation materials