Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 Kosygina Str., Moscow 119991, Russia
Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University Canberra ACT 0200, Australia
Received March 31, 2016
Vibrational modes of carbon nanoribbons are studied. It is demonstrated that in an unstretched nanoribbon localized oscillations (in the form of breathers) may occur only at its edges. The largest number of localized edge oscillations is expected for the nanoribbons with the “armchair” structure. Stretching of the nanoribbon may lead to the generation of new types of strongly localized oscillations. At stretching, in the oscillatory spectrum of the nanoribbon a frequency gap appears where the frequencies of the localized modes are located. An armchair nanoribbon can support localized modes only at its edge, however the stretched “zigzag” nanoribbon can support localized modes at both edges and bulk of the structure.