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Switching Spin and Charge between Edge States in Topological Insulator Constrictions

URN to cite this document:
urn:nbn:de:bvb:355-epub-219367
Krueckl, Viktor ; Richter, Klaus
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dated 26.08.2011
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arXiv PDF (21.04.2011)
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Date of publication of this fulltext: 29 Aug 2011 05:48



Abstract

We show how the coupling between opposite edge states, which overlap in a constriction made of the topological insulator mercury telluride (HgTe), can be employed both for steering the charge flow into different edge modes and for controlled spin switching. Unlike in a conventional spin transistor, the switching does not rely on a tunable Rashba spin-orbit interaction, but on the energy ...

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