Scale separation, topology, and time-reversal invariance
TYPETheor./Math. Physics Seminar
Speaker:Omri Gat
Affiliation:HUJI
Date:30.04.2017
Time:14:30
Location:Lewiner Seminar Room (412)
Abstract:

I will explain how Born-Oppenheimer-like energy surfaces in systems with slow and fast degrees of freedom can acquire non-trivial topology, and how this is affected by time-reversal invariance. I will then analyze time-reversal invariant two-dimensional energy surfaces and show that, in contrast with topological insulators, these are classified by an integer index, and may have a non-zero Chern number.