Phonon and structural changes in deformed bernal stacked bilayer graphene

Otakar Frank, Milan Bouša, Ibtsam Riaz, Rashid Jalil, Kostya S. Novoselov, Georgia Tsoukleri, John Parthenios, Ladislav Kavan, Konstantinos Papagelis, Costas Galiotis

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We present the first Raman spectroscopic study of Bernal bilayer graphene flakes under uniaxial tension. Apart from a purely mechanical behavior in flake regions where both layers are strained evenly, certain effects stem from inhomogeneous stress distribution across the layers. These phenomena such as the removal of inversion symmetry in bilayer graphene may have important implications in the band gap engineering, providing an alternative route to induce the formation of a band gap. © 2011 American Chemical Society.
    Original languageEnglish
    Pages (from-to)687-693
    Number of pages6
    JournalNano Letters
    Volume12
    Issue number2
    DOIs
    Publication statusPublished - 8 Feb 2012

    Keywords

    • band gap
    • Bilayer grapheme
    • Raman spectroscopy
    • strain
    • tension

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