1. Physics Department, United States Naval Academy, Annapolis, Maryland 20899, USA
2. Faculty of Physics, Chelyabinsk State University, 454001 Chelyabinsk, Russia
3. National University of Science and Technology “MISiS,” 119049 Moscow, Russia
4. Department of Physics, School of Engineering Science, LUT University, FI-53850 Lappeenranta, Finland
5. National Research South Ural State University, 454080 Chelyabinsk, Russia
6. Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
7. Chemical Engineering Department, Northeastern University, Boston, Massachusetts 02115, USA
8. Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, CH-1700 Fribourg, Switzerland
9. Physics Department, Northeastern University, Boston, Massachusetts 02115, USA