1. School of Electronic Information and Electrical Engineering Chengdu University Chengdu 610106 China
2. School of Electronic Science and Engineering (National Exemplary School of Microelectronics) University of Electronic Science and Technology of China Chengdu 610054 China
3. School of Electronics and Information Technology (School of Microelectronics) Sun Yat‐sen University Guangzhou 510006 China
4. College of Material Science and Engineering Sichuan University Chengdu 610064 China
5. School of Integrated Circuits Tsinghua University Beijing 100084 China