Low Temperature Physics: 42, 703 (2016); https://doi.org/10.1063/1.4961017
Fizika Nizkikh Temperatur: Volume 42, Number 8 (August 2016), p. 892-901    ( to contents , go back )

Localized vibrations of graphene nanoribbons

A.V. Savin

Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 Kosygina Str., Moscow 119991, Russia
E-mail: asavin@center.chph.ras.ru

Yu.S. Kivshar

Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University Canberra ACT 0200, Australia
E-mail: yks124@physics.anu.edu.au
pos Анотація:

Received March 31, 2016

Abstract

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.

PACS: 61.46.–w Structure of nanoscale materials;
PACS: 63.20.Pw Localized modes;
PACS: 63.20.Ry Anharmonic lattice modes.

Key words: graphene nanoribbons, edge modes, localized nonlinear vibrations.

Published online: June 24, 2016

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