ELFT HÍRADÓ

[Andras Palyi <palyi AT mail.bme.hu>]

Dear Colleagues, 

The Exotic Quantum Phases seminar series at BME continues next Monday with 
this talk:


Ilya Vekhter (Louisiana State University)
"Interface symmetry and non-helical states in topological insulator-based 
heterostructures"

Time: 14:00 (!) on Monday (June 17, 2019)
Location: seminar room of the theory department (BME Department of 
Theoretical Physics, Budafoki ut 8., building F, stairway III.)

Abstract: 
"Incorporating topological insulators (TIs) into prototype devices requires 
creating interfaces between topological and non-topological materials. It is 
often assumes that the interface states have the same properties as the 
well-studied helical Dirac states at the surfaces of TIs. I consider a planar 
boundary between a topologically-trivial semiconductor and a TI, and show 
that the topological interface states may be qualitatively different from 
those at the vacuum surface, are controlled by the residual symmetry of the 
interface,  and may exhibit elliptical contours of constant energy and 
complex spin textures with broken helicity. I will also discuss experimental 
signatures of broken symmetry of these states and propose measurements for 
its detection.”


Best regards,
Andras Palyi