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HL: Fachverband Halbleiterphysik

HL 17: Transport: Topological insulators 1 (TT with DS/HL)

HL 17.1: Hauptvortrag

Montag, 16. März 2015, 15:00–15:30, A 053

The Wires' Approach to Topological Insulators — •Yuval Oreg — Weizmann Institute of Science, Rehovot, Israel

We suggest a construction of a large class of topological states using an array of quantum wires. We will show how to construct a Chern insulator using an array of alternating wires that contain electrons and holes, correlated with an alternating magnetic field. A generalization to wires, with alternating spin-orbit couplings which give rise to integer and fractional (Abelian and non-Abelian) topological insulators, is then straightforward.

Following this construction we will discuss suggestions for two possible experiments which give rise to a fractional Josephson-effect and in addition a novel spin-resolved current correlation effect.