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Proceedings Paper

Switching spin and charge between edge states in topological insulator constrictions: a transer matrix approach
Author(s): Viktor Krueckl; Klaus Richter
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Paper Abstract

We show how the different spin polarized edge states of the two-dimensional topological insulator mercury telluride can be selectively switched within an elongated constriction. To this end, we derive an effective onedimensional Hamiltonian incorporating the confinement induced gap between right- and left-moving edge states, as well as an energy dependent effective spin-orbit interaction. By means of a transfer matrix approach, we study the transport properties based on this model Hamiltonian and reveal switching characteristics that can serve as the building block for a three state spin- and charge transistor based on a locally gated topological insulator constriction.

Paper Details

Date Published: 9 October 2012
PDF: 11 pages
Proc. SPIE 8461, Spintronics V, 84610Z (9 October 2012); doi: 10.1117/12.931306
Show Author Affiliations
Viktor Krueckl, Univ. Regensburg (Germany)
Klaus Richter, Univ. Regensburg (Germany)


Published in SPIE Proceedings Vol. 8461:
Spintronics V
Henri-Jean Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi, Editor(s)

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