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Spin-dependent conductance statistics in systems with spin-orbit coupling

Author

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  • Sergio L. A. de Queiroz

    (Instituto de Física, Universidade Federal do Rio de Janeiro)

Abstract

Spin-dependent partial conductances are evaluated in a tight-binding description of electron transport in the presence of spin-orbit (SO) couplings, using transfer-matrix methods. As the magnitude of SO interactions increases, the separation of spin-switching channels from non-spin-switching ones is gradually erased. Spin-polarised incident beams are produced by including a Zeeman-like term in the Hamiltonian. The exiting polarisation is shown to exhibit a maximum as a function of the intensity of SO couplings. For moderate site disorder, and both weak and strong SO interactions, no evidence is found for a decay of exiting polarisation against increasing system length. With very low site disorder and weak SO couplings a spin-filter effect takes place, as polarisation increases with increasing system length. Graphical abstract

Suggested Citation

  • Sergio L. A. de Queiroz, 2020. "Spin-dependent conductance statistics in systems with spin-orbit coupling," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 93(3), pages 1-7, March.
    • Handle: RePEc:spr:eurphb:v:93:y:2020:i:3:d:10.1140_epjb_e2020-100589-4
    DOI: 10.1140/epjb/e2020-100589-4
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    Keywords

    Solid State and Materials;

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