1. Center for Applied Physics and Technology, College of Engineering, Peking University, Beijing 100871, China
2. School of Materials Science and Engineering, BKL-MEMD, Peking University, Beijing 100871, China
3. Navigation and Control Technology Institute, NORINCO GROUP, Beijing 100089, China
4. New Industry Creation Hatchery Center, Tohoku University, Sendai 980-8577, Japan
5. Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur 603203, Tamil Nadu, India
6. School of Physics, Suranaree University of Technology, 111 University Venue Muang, Nakhon Ratchasima 30000, Thailand
7. Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284, United States