1. Institute for Theoretical Solid State Physics, IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
2. Department of Physics, Technical University Dresden, Helmholtzstrasse 10, 01069 Dresden, Germany
3. Joint Institute for Nuclear Research, Joliot-Curie 6, 141980 Dubna, Russia
4. Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Strasse 38, 01187 Dresden, Germany
5. Laboratoire de Modélisation
et Simulation Multi Echelle, Université Paris-Est, 5 Boulevard
Descartes, 77454 Marne-la-Vallée Cedex 2, France
6. Institute
for Theoretical Chemistry, Universität Stuttgart, Pfaffenwaldring
55, 70550 Stuttgart, Germany
7. Department of Physics, Northern Illinois University, De Kalb, Illinois 60115, United States
8. Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States