1. Department of Physics and OPTIMAS Research Center, Technische Universität Kaiserslautern, Erwin Schrödinger Straße, 67663 Kaiserslautern, Germany.
2. Graduate School Materials Science in Mainz, Staudinger Weg 9, 55128 Mainz, Germany.
3. ITMO University, Saint Petersburg 197101, Russia.
4. Deparatmento de Física and Centro de Física Teórica e Computacional, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Ed. C8, Lisboa 1749-016, Portugal.