1. Institute of Scientific Computing, Technische Universität Dresden, 01062 Dresden, Germany
2. IHP, Im Technologiepark 25, 15236 Frankfurt (Oder), Germany
3. Department of Materials Science, Università di Milano-Bicocca, Via R. Cozzi 55, I-20126 Milano, Italy
4. Dresden Center for Computational Materials Science (DCMS), TU Dresden, 01062 Dresden, Germany
5. Department of Sciences, Università Roma Tre, Viale Marconi 446, I-00146 Roma, Italy