1. Institute of Applied Physics TU Wien Vienna 1040 Austria
2. Central European Institute of Technology (CEITEC) Brno University of Technology Brno 612 00 Czechia
3. Faculty of Physics, Center for Computational Materials Science University of Vienna Vienna 1090 Austria
4. Advanced Research Center for Nanolithography 1098XG Amsterdam Netherlands
5. Dipartimento di Fisica e Astronomia Università di Bologna Bologna 40127 Italy