Affiliation: | 1. Institute of Physics, University of Rostock, Albert-Einstein-Strasse 23-25, Rostock, 18059 Germany;2. National Science Center, Kharkov Institute of Physics and Technology, Kharkov, 61108 Ukraine;3. Institute of Thermal Physics, Ural Branch of the Russian Academy of Sciences, Amundsen street 107a, Yekaterinburg, 620016 Russia |