Phonons in twisted bilayer graphene

Alexandr I. Cocemasov,1 Denis L. Nika,1,2,* and Alexander A. Balandin2,3,† 1E. Pokatilov Laboratory of Physics and Engineering of Nanomaterials, Department of Theoretical Physics, Moldova State University, Chisinau, MD-2009, Republic of Moldova 2Nano-Device Laboratory, Department of Electrical Engineering, Bourns College of Engineering, University of California–Riverside, Riverside, California 92521, USA 3Materials Science and Engineering Program, Bourns College of Engineering, University of California–Riverside, Riverside, California 92521, USA (Received 23 March 2013; revised manuscript received 22 May 2013; published 15 July 2013)