Nonlinear Excitations in Graphene and Other Carbon Nano-Polymorphs

Baimova, Julia A.; Korznikova, Elena A.; Chetverikov, A. P.

doi:10.1007/978-3-319-72218-4_7

Cited by 2 publications

(1 citation statement)

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“…Of particular interest is the interaction between phonons and other nonlinear lattice excitations, termed as either discrete breathers (DB) or intrinsic localized modes (ILM) [43,44,45,46,47]. Properties of DB in graphene and carbon nanotubes have been studied in a number of works [48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66]. In theoretical models, DB [67,68,69,70] and solitons [71] have been shown to affect thermal transport in certain nonlinear chains.…”

Section: Introductionmentioning

confidence: 99%

Interaction of longitudinal phonons with discrete breather in strained graphene

et al. 2018

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We numerically analyze the interaction of small-amplitude phonon waves with standing gap discrete breather (DB) in strained graphene. To make the system support gap DB, strain is applied to create a gap in the phonon spectrum. We only focus on the in-plane phonons and DB, so the issue is investigated under a quasi-one-dimensional setup. It is found that, for the longitudinal sound waves having frequencies below 6 THz, DB is transparent and thus no radiation of energy from DB takes place; whereas for those sound waves with higher frequencies within the acoustic (optical) phonon band, phonon is mainly transmitted (reflected) by DB, and concomitantly, DB radiates its energy when interacting with phonons. The latter case is supported by the fact that, the sum of the transmitted and reflected phonon energy densities is noticeably higher than that of the incident wave. Our results here may provide insight into energy transport in graphene when the spatially localized nonlinear vibration modes are presented.

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