1. Physical Sciences and Engineering DivisionKing Abdullah University of Science and Technology Thuwal 23955‐6900 Saudi Arabia
2. Shenyang National Laboratory for Materials ScienceInstitute of Metal Research (IMR)Chinese Academy of Sciences (CAS) Shenyang 110016 China
3. Institute of Electronics EngineeringNational TsingHua University Hsinchu 30013 Taiwan
4. Department of ElectrophysicsNational Chiao Tung University Hsinchu 30010 Taiwan
5. Computer, Electrical, and Mathematical Sciences and Engineering DivisionKing Abdullah University of Science and Technology Thuwal 23955‐6900 Saudi Arabia
6. Corporate Research and Chief Technology OfficeTaiwan Semiconductor Manufacturing Company (TSMC) Hsinchu 30075 Taiwan