1. National Research Center “Kurchatov Institute”
2. Moscow 123182
3. Russia
4. Faculty of Physics and Center for Computational Materials Science
5. University of Vienna
6. A-1090 Vienna
7. Austria
8. Institut für Theoretische Physik und Astrophysik and Würzburg-Dresden Cluster of Excellence ct.qmat
9. Universität Würzburg
10. Am Hubland Campus Süd
11. Würzburg 97074
12. Germany
13. Dipartimento di Fisica e Astronomia