Condensed Matter Seminar - Nadya Mason (University of Illinois-Urbana Champaign) "Surface State Transport in 3D Topological Insulators"

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Nadya Mason (University of Illinois-Urbana/Champaign) 1/14/19 CMT seminar speaker
January 14, 2019
11:30AM - 12:30PM
Location
1080 Physics Research Building

Date Range
Add to Calendar 2019-01-14 11:30:00 2019-01-14 12:30:00 Condensed Matter Seminar - Nadya Mason (University of Illinois-Urbana Champaign) "Surface State Transport in 3D Topological Insulators"

Topological insulators (TI’s) are materials that are insulators in their interiors, but have unique conducting states on their surfaces. They have attracted significant interest as fundamentally new electronic phases having potential applications from dissipationless interconnects to quantum computing. In this talk, I will discuss transport measurements of the topological surface state of the 3D TI Bi2Se3. I will describe several measurements which demonstrate the unique properties of surface transport: TI-superconductor junctions where the supercurrent is flows primarily through surface states, Aharonov-Bohm effects which demonstrate ballistic surface transport, and Fraunhofer spectroscopy where an in-plane magnetic field leads to finite momentum shifts in Cooper pairs.

1080 Physics Research Building Department of Physics physics@osu.edu America/New_York public
Description

Topological insulators (TI’s) are materials that are insulators in their interiors, but have unique conducting states on their surfaces. They have attracted significant interest as fundamentally new electronic phases having potential applications from dissipationless interconnects to quantum computing. In this talk, I will discuss transport measurements of the topological surface state of the 3D TI Bi2Se3. I will describe several measurements which demonstrate the unique properties of surface transport: TI-superconductor junctions where the supercurrent is flows primarily through surface states, Aharonov-Bohm effects which demonstrate ballistic surface transport, and Fraunhofer spectroscopy where an in-plane magnetic field leads to finite momentum shifts in Cooper pairs.