On July 9, 2015, at 14:00, in the library reading room "Dr. Dragan Popović" of the Institute of Physics Belgrade, Dr. Marko Grujić (School of Electrical Engineering, University of Belgrade) will present a seminar talk entitled:
"Chiral properties of topological-state loops"

Abstract:

The angular momentum quantization of chiral gapless modes confined to a circularly shaped interface between two different topological phases will be investigated. By examining several different setups, we show analytically that the angular momentum of the topological modes exhibits a highly chiral behavior, and can be coupled to spin and/or valley degrees of freedom, reflecting the nature of the interface states. A simple general one-dimensional model, valid for arbitrarily shaped loops, will be shown to predict the corresponding energies and the magnetic moments. These loops can be viewed as building blocks for artificial magnets with tunable and highly diverse properties.