Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 59: Low-Dimensional Systems: Poster Session
TT 59.10: Poster
Mittwoch, 9. März 2016, 15:00–18:30, Poster D
Inversion symmetry induced topological edge states in quantum wires — •Sudhakar Pandey1 and Carmine Ortix1,2 — 1Institute for Theoretical Solid State Physics, IFW Dresden, Helmholtzstr. 20, D-01069 Dresden, Germany — 2Institute for Theoretical Physics, Utrecht University, Leuvenlaan 4, 3584 CE Utrecht, The Netherlands
We demonstrate the existence of topologically non-trivial insulating phases in quantum wires as a consequence of inversion symmetry. The topologically non-trivial phases are characterized by a pair of in-gap edge states which are robust against weak disorder. We find that these topological edge states are identical to the so called Maue-Shockley surface states that can be predicted independently from the location of boundaries and the sign of the Fourier component which opens the insulating gap. We demonstrate that the insulating state can be switched between topologically non-trivial and trivial phases by suitably adjusting the controllable parameters of the Hamiltonian.