1. Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
2. Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
3. Adroit Materials, Cary, North Carolina 27518, United States
4. Institute of High Pressure Physics, Polish Academy of Sciences, Sokolowska 29/37, 01-142 Warsaw, Poland