title: Phonon and structural changes in deformed Bernal stacked bilayer graphene.
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.
authors.affiliation: J. Heyrovsky Institute of Physical Chemistry of the AS CR, v.v.i., Prague 8, Czech Republic. otakar.frank@jh-inst.cas.cz
authors.forename: Otakar
authors.initials: O
authors.lastname: Frank
authors.forename: Milan
authors.initials: M
authors.lastname: Bouša
authors.forename: Ibtsam
authors.initials: I
authors.lastname: Riaz
authors.forename: Rashid
authors.initials: R
authors.lastname: Jalil
authors.forename: Kostya S
authors.initials: KS
authors.lastname: Novoselov
authors.forename: Georgia
authors.initials: G
authors.lastname: Tsoukleri
authors.forename: John
authors.initials: J
authors.lastname: Parthenios
authors.forename: Ladislav
authors.initials: L
authors.lastname: Kavan
authors.forename: Konstantinos
authors.initials: K
authors.lastname: Papagelis
authors.forename: Costas
authors.initials: C
authors.lastname: Galiotis
mesh_terms: D006108:Graphite / Q000737:chemistry*; D008567:Membranes, Artificial; D015394:Molecular Structure; D060739:Phonons; D011108:Polymers / Q000737:chemistry; D013059:Spectrum Analysis, Raman
chemical_list: D008567:Membranes, Artificial; D011108:Polymers; D006108:Graphite