*James P. Ashton1, Patrick M. Lenahan1, Daniel J. Lichtenwalner2, Mark A. Anders3, Aivars J. Lelis4
(1. Penn State Univ.(United States of America), 2. Wolfspeed, a Cree Company(United States of America), 3. National Inst. of Standards and Tech.(United States of America), 4. United States Army Res. Labs.(United States of America))