1. Laboratoire
CRISMAT, UMR 6508 CNRS/ENSICAEN/UCBN, 6 bd du Maréchal Juin, F-14050 Caen Cedex 4, France
2. Institut für Materialphysik Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
3. EMAT,
Department of Physics, University of Antwerp, B-2020 Antwerp, Belgium
4. Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion
Beam Physics and Materials Research, 01328 Dresden, Germany
5. Department
of Applied Physics, Aalto University, P.O. Box 1100, 00076 Aalto, Finland
6. National University of Science and Technology MISiS, 4 Leninskiy prospekt, Moscow 119049, Russian Federation
7. Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany