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Spin filtering by a periodic spintronic device

Amnon Aharony, Ora Entin-Wohlman, Yasuhiro Tokura, and Shingo Katsumoto
Phys. Rev. B 78, 125328 – Published 30 September 2008

Abstract

For a linear chain of diamondlike elements, we show that the Rashba spin-orbit interaction (which can be tuned by a perpendicular gate voltage) and the Aharonov-Bohm flux (due to a perpendicular magnetic field) can combine to select only one propagating ballistic mode, for which the electronic spins are fully polarized along a direction that can be controlled by the electric and magnetic fields and by the electron energy. All the other modes are evanescent. For a wide range of parameters, this chain can serve as a spin filter.

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  • Received 27 May 2008

DOI:https://doi.org/10.1103/PhysRevB.78.125328

©2008 American Physical Society

Authors & Affiliations

Amnon Aharony1,*, Ora Entin-Wohlman1,*, Yasuhiro Tokura2, and Shingo Katsumoto3

  • 1Department of Physics and the Ilse Katz Center for Meso- and Nano-Scale Science and Technology, Ben Gurion University, Beer Sheva 84105, Israel
  • 2NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
  • 3Institute of Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan

  • *Also at Tel Aviv University.

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Issue

Vol. 78, Iss. 12 — 15 September 2008

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