Gauge fields at the surface of topological insulators
arXiv:1105.6132 · doi:10.1209/0295-5075/104/17001
Abstract
We study the emergence of gauge couplings in the surface states of topological insulators. We show that gauge fields arise when a three dimensional strong topological insulator is coated with an easy-plane ferromagnet with magnetization parallel to the surface. We analyze the modification induced by the gauge fields on the surface spectrum for some specific magnetic configurations.
We have fixed Fig. 2 b and c that were exchanged in the previous version