University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Friday, March 23rd 2018
12:20 pm:
Speaker: Daniel Sheehy, LSU
Subject: Interface symmetry and non-helical states in topological insulator-semiconductor heterostructures
Note: this seminar is in addition to the one on Wednesday. Please note change of day, time and room, This week only.

Topological insulators (TIs) possess topologically-protected helical
surface states that are immune to non-magnetic disorder and described
by a relativistic "Dirac" Hamiltonian. Similar states are expected
at the interface between a TI and any topologically trivial material.
I will discuss recent work showing that the interface states at the
boundary between a topologically-trivial semiconductor (SE) and a TI
possess a much richer phenomenology compared to the helical surface
states, including complex spin textures and broken helicity.

Faculty Host: Rafael Fernandes

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