Seminars And Colloquia This Week

ics Atomic
Monday, November 13, 2017
3:30 PM
Physics Building, Room 204

"Available"
ics Nuclear
Tuesday, November 14, 2017
3:30 PM
Physics Building, Room 204
RESERVED
ics High Energy
Wednesday, November 15, 2017
3:30 PM
Physics Building, Room 204

"Available"
ics Condensed Matter
Thursday, November 16, 2017
11:00 AM
Physics Building, Room 313
Ilya Vekhter [Host: Utpal Chatterjee]
Louisiana State University
"Interface symmetry and non-helical states in topological insulator-semiconductor heterostructures"
ABSTRACT:

Heterostructures combining topological and non-topological materials constitute the next frontier in the effort to incorporate topological insulators (TIs) into functional electronic devices. I show that the properties of the interface states appearing at the planar boundary between a topologically-trivial semiconductor (SE) and a TI are qualitatively different from those at the vacuum surface, and are controlled by the symmetry of the interface. In contrast to the well-studied helical Dirac surface states, SE-TI interface states exhibit elliptical contours of constant energy and complex spin textures with broken helicity. Experimental signatures include out of plane spin accumulation under a transport current and the opening of a spectral gap that depends on the direction of an applied in-plane magnetic field. I will also discuss how symmetry breaking at the interface controls proximity-induced superconductivity of the TI surface state. 

ics Colloquium
Friday, November 17, 2017
3:30 PM
Physics Building, Room 204
Patrick Charbonneau [Host: Marija Vucelja]
Duke University
"Recent Advances on the Glass Problem"
ABSTRACT:

Recent theoretical advances in the mean-field theory of glasses predict the existence, deep in the glass phase, of a novel phase transition, a so-called Gardner transition. This transition signals the emergence of a complex free energy landscape composed of a marginally stable hierarchy of sub-basins. It is also thought to be the onset of the anomalous thermal and transport properties of amorphous systems, and to ultimately lead to the unusual critical behavior at jamming. In this talk, I will present an overview of our recent theoretical and numerical advances in capturing and characterizing this novel materials feature.

To add a speaker, send an email to phys-speakers@Virginia.EDU. Please include the seminar type (e.g. Seminars and Colloquia), date, name of the speaker, title of talk, and an abstract (if available).