affiliation not provided to SSRN, University of Electronic Science and Technology of China (UESTC) - State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China (UESTC), affiliation not provided to SSRN, affiliation not provided to SSRN, University of Electronic Science and Technology of China (UESTC), affiliation not provided to SSRN and University of Electronic Science and Technology of China (UESTC)