“Topological transport in a spin-orbit coupled bosonic Mott insulator” by Dr. Clement Wong, Institute for Theoretical Physics , Utrecht University

Date: 
Wednesday, January 9, 2013 - 4:00pm
Series: 
Condensed Matter Physics Journal club Seminar

 

Condensed Matter Physics Journal club Seminar -  Wednesday, 9 January 2013 - PAB 4-330 at 4 P.M.

Dr. Clement Wong, Institute for Theoretical Physics , Utrecht University

Title of Talk: Topological transport in a spin-orbit coupled bosonic Mott insulator

Abstract

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.