1. School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, China
2. Department of Electrical and Computer Engineering, Auburn University, Auburn, AL, USA
3. School of Microelectronics, University of Science and Technology of China, Hefei, China
4. Department of Computer Science and Engineering, University of Notre Dame, Notre Dame, IN, USA
5. Department of Physics and Department of Electrical and Computer Engineering, Auburn University, Auburn, AL, USA