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Interaction of longitudinal phonons with discrete breather in strained graphene

Author

Listed:
  • Iman Evazzade

    (Faculty of Science, Ferdowsi University of Mashhad)

  • Mahmood Rezaee Roknabadi

    (Faculty of Science, Ferdowsi University of Mashhad)

  • Mohammad Behdani

    (Faculty of Science, Ferdowsi University of Mashhad)

  • Fatemeh Moosavi

    (Faculty of Science, Ferdowsi University of Mashhad)

  • Daxing Xiong

    (Fuzhou University)

  • Kun Zhou

    (School of Mechanical and Aerospace Engineering, Nanyang Technological University)

  • Sergey V. Dmitriev

    (Institute for Metals Superplasticity Problems, Russian Academy of Sciences
    National Research Tomsk State University)

Abstract

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.

Suggested Citation

  • Iman Evazzade & Mahmood Rezaee Roknabadi & Mohammad Behdani & Fatemeh Moosavi & Daxing Xiong & Kun Zhou & Sergey V. Dmitriev, 2018. "Interaction of longitudinal phonons with discrete breather in strained graphene," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 91(7), pages 1-7, July.
    • Handle: RePEc:spr:eurphb:v:91:y:2018:i:7:d:10.1140_epjb_e2018-90055-3
    DOI: 10.1140/epjb/e2018-90055-3
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    Solid State and Materials;

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