1. Nano-Device Laboratory (NDL) and Phonon Optimized Engineered Materials (POEM) Center, Department of Electrical and Computer Engineering, Bourns College of Engineering, University of California – Riverside, Riverside, California 92521, USA
2. Departments of Electrical, Computer and Systems Engineering and Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
3. Ioffe Physical-Technical Institute, Russian Academy of Sciences, St. Petersburg 194021, Russia