Long-lived discrete breathers in free-standing graphene
arXiv:1507.06416 · doi:10.1016/j.chaos.2016.04.015
Abstract
Intrinsic localized modes or discrete breathers are investigated by molecular dynamics simulations in free-standing graphene. Discrete breathers are generated either through thermal quenching of the graphene lattice or by proper initialization, with frequencies and lifetimes sensitively depending on the interatomic potential describing the carbon-carbon interaction. In the most realistic scenario, for which temperature-dependent molecular dynamics simulations in three dimension using a graphene-specific interatomic potential are performed, the breather lifetimes increase to hundreds of picoseconds even at relatively high temperatures. These lifetimes are much higher than those anticipated from earlier calculations, and may enable direct breather observation in Raman spectroscopy experiments.
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- Wavelet imaging of transient energy localization in nonlinear systems at thermal equilibrium: the case study of NaI crystals at high temperature
- Interaction of phonons with discrete breather in strained graphene
- Multistable Dissipative Breathers and Novel Collective States in SQUID Lieb Metamaterials
- Localization in Coupled Finite Vibro-Impact Chains: Discrete Breathers and Multibreathers