Abstract
We report on a theoretical study of the electronic, optical, and magneto-optical properties of digital ferromagnetic heterostructures based on Mn -doped GaAs. We consider different structures corresponding to Mn contents within the range 12%–50% and we study how the system changes as a function of the doping concentration. Our first-principles approach includes the spin-orbit interaction in a fully relativistic pseudopotential scheme and the local-field effect in the description of the optical absorption. We show that Mn -doped GaAs shares many properties with the uniformly doped system, i.e., half-metallicity, similar absorption spectra, and moderate Kerr rotation angles in the visible spectral region.
4 More- Received 9 December 2014
DOI:https://doi.org/10.1103/PhysRevB.91.075207
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