1. Nano-Device Laboratory
(NDL) and Phonon Optimized Engineered Materials (POEM) Center, Department
of Electrical and Computer Engineering, University of California, Riverside, Riverside, California 92521, United States
2. Department
of Electrical, Computer, and Systems Engineering, Center for Integrated
Electronics, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
3. Ioffe Institute, St. Petersburg 194021, Russia
4. Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States