We report on a theoretical study of the electronic, optical and magneto-optical properties of digital ferromagnetic hetero-structures based on Mnδ--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 fields effect in the description of the optical absorption. We show that Mnδ-doped GaAs shares many properties with the uniformly doped Ga1−xMnxAs system, i.e. half-metallicity, similar absorption spectra, and moderate Kerr rotation angles in the visible spectral region.
@article{arxiv.1502.05863,
title = {$Ab$-$initio$ electronic structure, optical and magneto-optical properties of $MnGaAs$ digital ferromagnetic heterostructures},
author = {Patrizia Rosa and Davide Sangalli and Giovanni Onida and Alberto Debernardi},
journal= {arXiv preprint arXiv:1502.05863},
year = {2015}
}