1. Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah, United Arab Emirates
2. Department of Applied Physics and Astronomy, University of Sharjah, P.O. Box 27272 Sharjah, United Arab Emirates
3. Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden
4. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
5. School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
6. Kotelnikov Institute of Radioengineering and Electronics of RAS, 125009 Moscow, Russia
7. National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences and Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing 210000, China
8. M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 620990 Yekaterinburg, Russia
9. WISE-Wallenberg Initiative Materials Science, Uppsala University, SE-751 20 Uppsala, Sweden