1. Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9/165-TC, A-1060 Vienna, Austria
2. Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle, Germany
3. Institut für Festkörpertheorie und -optik, Friedrich-Schiller-Universität Jena and European Theoretical Spectroscopy Facility, Max-Wien-Platz 1, 07743 Jena, Germany
4. Rutherford Appleton Laboratory, Scientific Computing Department Science and Technology Facilities Council, Didcot OX11 0QX, United Kingdom
5. Department of Physics and Warwick Centre for Predictive Modelling, School of Engineering, University of Warwick, Coventry CV4 7AL, United Kingdom