<< December 2013 >>
Sun Mon Tue Wed Thu Fri Sat
 1   2   3   4   5   6   7 
 8   9   10   11   12   13   14 
 15   16   17   18   19   20   21 
 22   23   24   25   26   27   28 
 29   30   31   
Add an Event

R. G. Herb Condensed Matter Seminars

<< Summer 2013 Fall 2013 Spring 2014 >>
Subscribe to receive email announcements of events

Events During the Week of December 8th through December 15th, 2013

Monday, December 9th, 2013

No events scheduled

Tuesday, December 10th, 2013

No events scheduled

Wednesday, December 11th, 2013

No events scheduled

Thursday, December 12th, 2013

Topological Kondo Insulators
Time: 10:00 am
Place: 5310 Chamberlin
Speaker: Victor Galitski, University of Maryland
Abstract: In this talk I will review recent theoretical work on a new class of topological material systems - topological Kondo insulators, which appear as a result of interplay between strong correlations and spin-orbit interactions. I will start with introducing the by now standard theory of topological band insulators and explain the Fu-Kane method to calculate the Z2 topological index for time-reversal-invariant band structures in three dimensions. The method will be used to show that hybridization between the conduction electrons and localized f-electrons in certain heavy fermion compounds gives rise to interaction-induced topological insulating behavior. A mean field theory of these Kondo topological insulators will be derived. I will also discuss recent experimental results, which have conclusively confirmed our predictions in the Samarium hexaboride compound, where the long-standing puzzle of the residual low-temperature conductivity has been shown to originate from topological surface states. This material system represents the first true topological insulator observed experimentally with low-temperature transport dominated by the surface and essentially no conduction in the bulk. In conclusion, I will mention our ongoing theory work, which focuses on very unusual non-linear transport properties of Samarium hexaboride devices, which mimic neuron-like behavior in biological systems.
Host: Vavilov
Add this event to your calendar

Friday, December 13th, 2013

No events scheduled

©2013 Board of Regents of the University of Wisconsin System