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Magnetic switching and spin filtering in an edge-state device based on HgTe waveguides

Author

Listed:
  • Feng Zhai

    (Zhejiang Normal University
    University of Puerto Rico)

  • Xuanping Jin

    (Zhejiang Normal University)

  • Juan Pastrana

    (University of Puerto Rico)

  • Junqiang Lu

    (University of Puerto Rico)

Abstract

We investigate theoretically the edge channel transport in a HgTe waveguide modulated by two magnetic barriers. For an electron incident from a quantum-spin-Hall state in leads, the transmission can depend strongly on the relative orientation (parallel or antiparallel) of the two magnetic barriers as its energy is near the bulk conduction band of leads. For the antiparallel configuration, the transmission is spin-independent and can be suppressed drastically. For the parallel configuration, the electron can transmit nearly perfectly for a proper spin orientation. This contrast in transmission indicates that the proposed edge-state device may serve as a magnetic switch and a spin filter.

Suggested Citation

  • Feng Zhai & Xuanping Jin & Juan Pastrana & Junqiang Lu, 2016. "Magnetic switching and spin filtering in an edge-state device based on HgTe waveguides," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 89(3), pages 1-5, March.
    • Handle: RePEc:spr:eurphb:v:89:y:2016:i:3:d:10.1140_epjb_e2016-60872-5
    DOI: 10.1140/epjb/e2016-60872-5
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    Keywords

    Solid State and Materials;

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