Nanoscale features of magnetic dopants in 2D systems with spin-orbit interaction

ORAL

Abstract

The combination of spin-orbit coupling with broken spatial inversion symmetry in semiconductors (e.g. zinc-blende quantum-wells and surfaces) and localized spin states originated from a single magnetic dopant is a promising system to realize future semiconductor spintronics devices.
We present a theory of magnetic dopant in a two-dimensional electron gas model with Rashba-Bychkov and Dresselhaus spin-orbit couplings. The spatial anisotropy dependency on the ratio of the strengths of the spin-orbits fields offers a possibility to locally tune spin-orbit induced features of the dopant such as spin textures and circulating current associated with the ground state of the dopant. This circulating current is dissipationless and represents an electron moving in a closed trajectory. The orbital moment associated with the circulating current could be distinguished from the spin contribution by directly measuring the dc-magnetic field it produces through nanoscale magnetometry techniques provided by NV-centers in diamond

*This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 721394 and support from US DOE BES Award No. DE-SC0016379.

–

Presenters

  • Adonai Rodrigues da Cruz

    • Department of Applied Physics, Eindhoven University of Technology

Authors

  • Adonai Rodrigues da Cruz

    • Department of Applied Physics, Eindhoven University of Technology

  • Michael Flatté

    • Department of Physics and Astronomy, The University of Iowa
    • University of Iowa
    • Department of Physics, University of Iowa
    • Physics and Astronomy, Univ of Iowa
    • Department of Physics and Astronomy, University of Iowa, Department of Applied Physics, Eindhoven University of Technology
    • Department of Physics, University of Iowa; Department of Applied Physics, Eindhoven University of Technology
    • Univ. of Iowa/Eindoven University of Technology
    • Department of Physics and Astronomy, University of Iowa
    • Univ of Iowa