Affiliation: | ( School of Advanced Materials and Nanotechnology, Xidian University, Xi' an 710071, China 2. Key Laboratory for Wide Band-Gap Semiconductor Materials and Devices, School of Microelectronics, Xidian University, Xi'an 71007 l, China 3. Key Laboratory of Microelectronics Device & Integrated Technology, Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China) |