1. School
of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
2. SEMATECH, Albany, New York 12203, United States
3. College
of Nanoscale Science and Engineering, State University of New York at Albany, Albany, New York 12203, United States
4. Intel Corporation, Santa Clara, California 95054, United States