1. School of Physics and Materials Science, Institute of Physical Science and Information Technology, Anhui Key Laboratory of Information Materials and Devices, Anhui University, No. 111, Jiulong Road, Shushan
District, Hefei 230601, China
2. National Synchrotron Radiation Laboratory, University of Science and Technology of China, No. 42, Hezuohua South Road, Shushan District, Hefei 230029, China