1. State Key Laboratory of Electronic Thin Films and Integrated Devices
2. University of Electronics Science and Technology of China
3. Chengdu 610054
4. People's Republic of China
5. Institute of Microelectronics and Tsinghua National Laboratory for Information Science and Technology (TNList)
6. Department of Electrical Engineering and Computer Science
7. University of Michigan
8. Ann Arbor
9. USA
10. SUNY College of Nanoscale Science and Engineering
11. State University of New York
12. Albany