Non-orthogonal spin-momentum locking in strongly spin-orbit coupled materials

ORAL

Abstract

Orthogonal spin-momentum locking is a general feature of the Rashba spin-orbit coupled surfaces. Recently, experimental evidence for non-orthogonal spin-momentum locking (NOSML) has been reported on the topological surface of α-Sn. [1] Here, we discuss the non-magnetic impurity scattering as a candidate mechanism to this isotropic NOSML state. Our results are applicable to spin-orbit coupled systems generally and are not limited to topological states. The NOSML state is of interest in understanding and identifying spin-orbit dependent phenomena and their spectroscopic signatures in topological and non-topological materials.

[1] Scholz, M. R. et al., Topological surface state of α-Sn on InSb(001) as studied by photoemission, Phys. Rev. B 97, 075101 (2018).

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Presenters

  • Wei-Chi Chiu

    • Department of Physics, Northeastern University

Authors

  • Wei-Chi Chiu

    • Department of Physics, Northeastern University

  • Tugrul Hakioglu

    • Energy Institute and Department of Physics, Istanbul Technical University

  • Robert Markiewicz

    • Department of Physics, Northeastern University
    • Northeastern University

  • Bahadur Singh

    • Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research
    • Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research
    • Department of Condensed Matter Physics and Material Science, Tata Institute of Fundamental Research
    • Tata Institute of Fundamental Research
    • Tata Institute for Fundamental Research
    • DCMPMS, Tata Institute of Fundamental Research, India
    • Condensed Matter Physics and Material Science, Tata Institute of Fundamental Research
    • Department of Condensed Matter Physics & Materials Science, Tata Institute of Fundamental Research

  • Arun Bansil

    • Department of Physics, Northeastern University
    • Northeastern University
    • NU
    • Department of Physics, Northeastern University, USA