G. Lucovsky1,2, G.N. Parsons1,2, C. Wang1,2, B.N. Davidson1,2, D.V. Tsu1,2
1Department of Physics, North Carolina State University, Raleigh, NC 27695-8202, U.S.A
2Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695-8202 U.S.A.