1. Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112, United States
2. International Center for Quantum Design of Functional Materials (ICQD), University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
3. College of Physics and Optoelectronic Engineering, Ocean University of China, Qingdao, Shandong 266100, People’s Republic of China
4. Department of Physics & Astronomy, University of Utah, Salt Lake City, Utah 84112, United States