1. Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27607, United States
2. Department of Materials Science and Engineering, Stanford University, Palo Alto, California 94305, United States
3. Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
4. Department of Physics and Electrical Engineering, Columbia University, New York, New York 10027, United States
5. Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
6. Department of Mechanical Engineering and the Materials Science and Engineering Program, The University of Texas at Austin, Austin, Texas 78712, United States
7. Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
8. Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
9. Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720, United States
10. Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106, United States
11. Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
12. Department of Electrical and Computer Engineering, Cornell University, Ithaca, New York 14850, United States
13. Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210, United States