1. Department of Physics, Columbia University, New York, New York 10027, United States
2. Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, United States
3. Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794, United States
4. Department of Material Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
5. Material Science & Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
6. Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
7. Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
8. National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
9. Department of Mechanical Engineering, Columbia University, New York, New York 10027, United States