2016 Materials science lecture series: advanced materials - 13 December 2016
Dec 13, 2016 - 14.00 uur
Agoralaan Gebouw D
Lokaal Aula H5
de heer Rajesh RAMANETI
MRS/E-MRS joint student chapter, Hasselt University with IMO-IMOMEC: 2016 materials science lecture series: advanced materials.
Speaker: Prof. Dr. Bart Sorée - University of Antwerp, KU Leuven, IMEC.
Topic: Topological insulators
Chaired by: Dr. Danny Vanpoucke, IMO-IMOMEC, Hasselt University
Tuesday 13 December 2016, 14:00 -15:00
Aula H5, Building D, Hasselt University, Campus Diepenbeek.
This lecture introduces a new class of materials known as topological insulators. We start with some considerations regarding the meaning of the word “topological” in solid-state physics and use the established quantum Hall effect in a 2D electron gas as a paradigm shift in thinking about the robust quantization of the associated 1D chiral edge states (Landau states) as topological protected states through the Chern number. Next we introduce the concept of the 2D quantum spin Hall effect with associated 1D helical edge states using graphene as a starting point and shortly discuss the Z2 topological invariant and experimental verification of 2D topological insulators.
The lecture will be conclude with 3D topological insulators having 2D topologically protected surface states and some thoughts on possible applications currently being envisaged. At this moment the research field of topological insulators is one of the hottest topics both in theoretical and experimental physics as the search for new topological insulator materials, their physical properties and possible applications is accelerating