*Mikhail Lyubomirskiy1, Frieder Koch2, Ksenia Abrashitova3, Vladimir Bessonov3,4, Natalia Kokareva3, Alexander Petrov3, Frank Seiboth1, Felix Wittwer1, Maik Kahnt1, Martin Seyrich1, Andrey Fedyanin3, Christian David2, Christian Schroer5,1
(1. Deutsches Elektronen-Synchrotron DESY, 2. Laboratory for Micro- and Nanotechnology, Paul Scherrer Institute, 3. Faculty of Physics, Lomonosov Moscow State University, 4. Frumkin Institute of Physical Chemistry and Electrochemistry, 5. Department Physik, Universität Hamburg)