1. Key Laboratory of Solid-state Physics and Devices
2. School of Physical Science and Technology
3. Xinjiang University
4. Urumqi 830046
5. China
6. School of Physics and Optoelectronic Engineering
7. Guangdong University of Technology
8. Guangzhou 510006
9. Key Laboratory of Ecophysics and Department of Physics
10. School of Science
11. Shihezi University
12. Xinjiang 832003