1. Department of Physics and Astronomy and Department of Electrical Engineering and Computer Science Vanderbilt University Nashville TN 37235 USA
2. Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
3. Department of Mechanical Engineering University of Minnesota Minneapolis MN 55455 USA
4. Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 China
5. Department of Physics Southern University of Science and Technology, and Shenzhen Institute for Quantum Science and Engineering Shenzhen 518055 China
6. Department of Physics and Astronomy Stony Brook University Stony Brook NY 11794 USA
7. Department of Electrical and Computer Engineering University of Minnesota Minneapolis MN 55455 USA