BEGIN:VCALENDAR VERSION:2.0 PRODID:Data::ICal 0.22 BEGIN:VEVENT DESCRIPTION:Ilya Vekhter\, Louisiana State University\n\n
Heterostructures combining topological and n on-topological materials constitute the next frontier in the effort to inc orporate 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 control led by the symmetry of the interface. In contrast to the well-studied heli cal Dirac surface states\, SE-TI interface states exhibit elliptical conto urs of constant energy and complex spin textures with broken helicity. Exp erimental signatures include out of plane spin accumulation under a transp ort current and the opening of a spectral gap that depends on the directio n 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. \;
\n DTSTART:20171116T160000Z LOCATION:Physics Building\, Room 313 SUMMARY:Interface symmetry and non-helical states in topological insulator- semiconductor heterostructures END:VEVENT END:VCALENDAR