1. II. Institute of Physics B and JARA-FIT, RWTH Aachen University, 52062 Aachen, Germany
2. Facultad de Ciencias, Universidad Autónoma de Baja California, 21100 Mexicali, Baja California México
3. Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, United States
4. Instituto Politécnico, Universidade do Estado de Rio de Janeiro, 28625-570 Nova Friburgo, Brasil
5. Instituto de Física, Universidade Federal Fluminense, Niterói, 24210-340 Rio de Janeiro Brazil
6. Dahlem Center for Complex Quantum Systems
and Institut für Theoretische, Freie Universität Berlin, 14195 Berlin, Germany
7. Institute for Theoretical Physics II, University of Erlangen-Nüremberg, 91058 Erlangen, Germany
8. Johannes Gutenberg-Universität, 55122 Mainz, Germany
9. Physics and Materials Science Research Unit, University of Luxembourg, L-1511 Luxembourg, Luxembourg
10. School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom