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Element- and momentum-resolved electronic structure of the dilute magnetic semiconductor manganese doped gallium arsenide

  • Author(s): Nemšák, S
  • Gehlmann, M
  • Kuo, CT
  • Lin, SC
  • Schlueter, C
  • Mlynczak, E
  • Lee, TL
  • Plucinski, L
  • Ebert, H
  • Di Marco, I
  • Minár, J
  • Schneider, CM
  • Fadley, CS
  • et al.
Abstract

© 2018, The Author(s). The dilute magnetic semiconductors have promise in spin-based electronics applications due to their potential for ferromagnetic order at room temperature, and various unique switching and spin-dependent conductivity properties. However, the precise mechanism by which the transition-metal doping produces ferromagnetism has been controversial. Here we have studied a dilute magnetic semiconductor (5% manganese-doped gallium arsenide) with Bragg-reflection standing-wave hard X-ray angle-resolved photoemission spectroscopy, and resolved its electronic structure into element- and momentum- resolved components. The measured valence band intensities have been projected into element-resolved components using analogous energy scans of Ga 3d, Mn 2p, and As 3d core levels, with results in excellent agreement with element-projected Bloch spectral functions and clarification of the electronic structure of this prototypical material. This technique should be broadly applicable to other multi-element materials.

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