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)

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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