1. International College of Semiconductor Technology, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
2. Institute of Electronics, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
3. Institute of Pioneer Semiconductor Innovation, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
4. Imec, 3000 Leuven, Belgium
5. School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, AZ 85287, USA
6. Department of Physics and Astronomy, KU Leuven, 3000 Leuven, Belgium