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Electric and magnetic gating of Rashba-active weak links

A. Aharony, O. Entin-Wohlman, M. Jonson, and R. I. Shekhter
Phys. Rev. B 97, 220404(R) – Published 15 June 2018
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Abstract

In a one-dimensional weak-link wire the spin-orbit interaction (SOI) alone cannot generate a nonzero spin current. We show that a Zeeman field acting in the wire in conjunction with the Rashba SOI there does yield such a current, whose magnitude and direction depend on the direction of the field. When this field is not parallel to the effective field due to the SOI, both the charge and the spin currents oscillate with the length of the wire. Measuring the oscillating anisotropic magnetoresistance can thus yield information on the SOI strength. These features are tuned by applying a magnetic and/or an electric field, with possible applications to spintronics.

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  • Received 3 May 2018

DOI:https://doi.org/10.1103/PhysRevB.97.220404

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

A. Aharony1,2,3,*, O. Entin-Wohlman1,2,3, M. Jonson3,4, and R. I. Shekhter3,4

  • 1Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
  • 2Physics Department, Ben Gurion University, Beer Sheva 84105, Israel
  • 3IBS Center for Theoretical Physics of Complex Systems, 34051 Daejeon, South Korea
  • 4Department of Physics, University of Gothenburg, SE-412 96 Göteborg, Sweden

  • *aaharony@bgu.ac.il

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Issue

Vol. 97, Iss. 22 — 1 June 2018

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