Impurity effects in interaction driven topological insulators
DIPC Seminars
- Speaker
-
Dmitri Efremov, Leibniz Institute for Solid State Physics and Material Research, Germany
- When
-
2019/03/07
13:00 - Place
- Donostia International Physics Center
- Add to calendar
-
iCal
Interaction-driven topological phases significantly enrich the class of
topological materials. In this talk I discuss the effect of disorder on the
weak-coupling instabilities of the quadratic band crossing point (QBCP) in
two-dimensional Fermi systems, which, in the clean limit, display interaction-
driven topological insulating phases. After considering possible instabilities
and corresponding ordered phases I will show that the disorder generally
suppresses the critical temperature at which the interaction-driven
topologically non-trivial order sets in. Moreover, strong disorder can also
cause a topological phase transition into a topologically trivial insulating
state.
Host: V. Silkin