Interaction of longitudinal phonons with discrete breather in strained graphene
| Autor: | Kun Zhou, Sergey V. Dmitriev, Mahmood Rezaee Roknabadi, Fatemeh Moosavi, Mohammad Behdani, Iman Evazzade, Daxing Xiong |
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| Přispěvatelé: | School of Mechanical and Aerospace Engineering |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
деформированный графен
Solid-state physics Terahertz radiation Phonon Breather Complex system 02 engineering and technology Radiation 01 natural sciences law.invention Condensed Matter::Materials Science law 0103 physical sciences фононы 010306 general physics Physics Condensed matter physics Longitudinal Phonons Graphene 021001 nanoscience & nanotechnology Condensed Matter Physics дискретные бризеры Solid State and Materials Electronic Optical and Magnetic Materials Mechanical engineering [Engineering] 0210 nano-technology Energy (signal processing) |
| Zdroj: | The European physical journal B. 2018. Vol. 91, № 7. P. 163 (1-7) |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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