1. L-NESS, Dipartimento di Fisica, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy
2. Materials Science Center and Faculty of Physics, Philipps-Universität Marburg, Hans-Meerweinstraße 6, 35032 Marburg, Germany
3. Institute of Scientific Computing, Technische Universität Dresden, 01062 Dresden, Germany
4. Dresden Center for Computational Materials Science, Technische Universität Dresden, 01062 Dresden, Germany
5. L-NESS and Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, Via R. Cozzi 55, I-20125 Milano, Italy
6. James Watt School of Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow G12 8LT, United Kingdom