1. Key Laboratory of Nanodevices and Applications; Suzhou Institute of Nano-Tech and Nano-Bionics; Chinese Academy of Science; Suzhou 215123 China
2. Key Laboratory of Functional Materials and Devices for Special Environments of CAS; Xinjiang Key Laboratory of Electronic Information Materials and Devices; Xinjiang Technical Institute of Physics and Chemistry of Chinese Academy of Science; 40-1 South Beijing Road Urumqi 830011 China
3. University of Chinese Academy of Sciences; 19 A Yuquan Rd Beijing 100049 China
4. Department of Physics; Changji University; Changji 831100 China