1. CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, CAS; Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi 830011, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. Condensed Matter Group, Department of Physics, Hangzhou Normal University, Hangzhou 310036, China
4. Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States