1. Micron School of Materials Science and Engineering, Boise State University, Boise, Idaho 83725, United States
2. Materials Science and Engineering, Stanford University, Stanford, California 93405, United States
3. Electrical and Computer Engineering, Tufts University, Medford, Massachusetts 02155, United States
4. Condensed Matter and Materials Physics, Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
5. Department of Physics, Boise State University, Boise, Idaho 83725, United States