Institution: | a Institute of Materials Science, NCSR “Demokritos”, Aghia Paraskevi 153 10, Greece b Lawrence Livermore National Laboratory, Livermore, CA 94550, USA c Department of Mechanics and Materials Science, Rutgers University, Piscataway, NJ 08855-0909, USA d Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA |