Theory of the circulating current of a single magnetic impurity in a semiconductor

ORAL

Abstract

The localized electron spin of a single impurity in a semiconductor is a promising system to realize quantum information schemes [1]. Coherent control of this spin depends on understanding the structure of the magnetic moment that couples the system with external fields. In this work we investigate the spin-orbit induced circulating current associated with the ground state of a single magnetic impurity in zincblende III-V semiconductor. This circulating current is dissipationless and represents an electron moving in a closed trajectory producing an orbital contribution to the magnetic moment [2]. We developed a formalism employing Green’s functions obtained by the Koster-Slater technique [3,4] with a sp3d5s* empirical tight-binding Hamiltonian to describe the host material.

[1] Koenraad,P. M. and Flatté, M. E. , Nature Materials 10, 1038 (2011).
[2] van Bree, J. and Silov, A. Yu and Koenraad,P. M. and Flatté,M. E., Phys. Rev. Lett. 112, 187201 (2014).
[3] Tang,J. M. and Flatté, M.E., Phys. Rev. Lett. 92, 047201 (2004).
[4] Kortan, V. R. and Sahin, C. and Flatté, M. E., PRB 93, 220402(R) (2016)

*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

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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

    • Optical Science and Technology Center and Department of Physics and Astronomy, University of Iowa
    • Department of Physics and Astronomy and Optical Science and Technology Center, University of Iowa
    • Physics and Astronomy, University of Iowa, Iowa City
    • University of Iowa
    • Department of Physics and Astronomy, University of Iowa
    • Physics and Astronomy, University of Iowa