Affiliation: | 1. Department of Physics, CICECO ? Aveiro Institute of Materials and I3N, University of Aveiro, Aveiro, Portugal;2. Department of Physics and CICECO ? Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal;3. Department of Mechanical Engineering, University of Minnesota Minneapolis, MN, USA;4. Department of Physics and I3N, University of Aveiro, Aveiro, Portugal;5. Walter Schottky Institut and Physik–Department, Technische Universit?t München, Garching, Germany |