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Title: Spin-polarized currents in the tunnel contact of a normal conductor and a two-dimensional topological insulator

Abstract

The spin filtering of electrons tunneling from the edge states of a two-dimensional topological insulator into a normal conductor under a magnetic field (external or induced due to proximity to a magnetic insulator) is studied. Calculations are performed for a tunnel contact of finite length between the topological insulator and an electronic multimode quantum strip. It is shown that the flow of tunneling electrons is split in the strip, so that spin-polarized currents arise in its left and right branches. These currents can be effectively controlled by the contact voltage and the chemical potential of the system. The presence of a magnetic field, which splits the spin subbands of the electron spectrum in the strip, gives rise to switching of the spin current between the strip branches.

Authors:
 [1]
  1. Russian Academy of Sciences, Kotel'nikov Institute of Radio Engineering and Electronics (Fryazino branch) (Russian Federation)
Publication Date:
OSTI Identifier:
22210448
Resource Type:
Journal Article
Journal Name:
Semiconductors
Additional Journal Information:
Journal Volume: 47; Journal Issue: 11; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7826
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; ELECTRIC POTENTIAL; ELECTRON SPECTRA; ELECTRONS; MAGNETIC FIELDS; SPIN; SPIN ORIENTATION; TUNNEL EFFECT; TUNNELS

Citation Formats

Sukhanov, A. A., E-mail: AASukhanov@yandex.ru, and Sablikov, V. A. Spin-polarized currents in the tunnel contact of a normal conductor and a two-dimensional topological insulator. United States: N. p., 2013. Web. doi:10.1134/S1063782613110213.
Sukhanov, A. A., E-mail: AASukhanov@yandex.ru, & Sablikov, V. A. Spin-polarized currents in the tunnel contact of a normal conductor and a two-dimensional topological insulator. United States. https://doi.org/10.1134/S1063782613110213
Sukhanov, A. A., E-mail: AASukhanov@yandex.ru, and Sablikov, V. A. 2013. "Spin-polarized currents in the tunnel contact of a normal conductor and a two-dimensional topological insulator". United States. https://doi.org/10.1134/S1063782613110213.
@article{osti_22210448,
title = {Spin-polarized currents in the tunnel contact of a normal conductor and a two-dimensional topological insulator},
author = {Sukhanov, A. A., E-mail: AASukhanov@yandex.ru and Sablikov, V. A.},
abstractNote = {The spin filtering of electrons tunneling from the edge states of a two-dimensional topological insulator into a normal conductor under a magnetic field (external or induced due to proximity to a magnetic insulator) is studied. Calculations are performed for a tunnel contact of finite length between the topological insulator and an electronic multimode quantum strip. It is shown that the flow of tunneling electrons is split in the strip, so that spin-polarized currents arise in its left and right branches. These currents can be effectively controlled by the contact voltage and the chemical potential of the system. The presence of a magnetic field, which splits the spin subbands of the electron spectrum in the strip, gives rise to switching of the spin current between the strip branches.},
doi = {10.1134/S1063782613110213},
url = {https://www.osti.gov/biblio/22210448}, journal = {Semiconductors},
issn = {1063-7826},
number = 11,
volume = 47,
place = {United States},
year = {Fri Nov 15 00:00:00 EST 2013},
month = {Fri Nov 15 00:00:00 EST 2013}
}