1. Aix Marseille Univ, Université de Toulon, CNRS, IM2NP, Marseille, France
2. Institute of Scientific Computing, TU Dresden, 01062 Dresden, Germany
3. Dresden Center for Computational Materials Science (DCMS), TU Dresden, 01062 Dresden, Germany
4. Laboratory for Nanostructure Epitaxy and Spintronics on Silicon, Istituto di Fotonica e Nanotecnologie-Consiglio Nazionale delle Ricerche, Via Anzani 42, 22100 Como, Italy