title: Quantum-Chemical Calculation and Visualization of the Vibrational Modes of Graphene in Different Points of the Brillouin Zone.
abstract: Different notations of graphene irreducible representations and optical modes could be found in the literature. The goals of this paper are to identify the correspondence between available notations, to calculate the optical modes of graphene in different points of the Brillouin zone, and to compare them with experimental data obtained by Raman and coherent anti-Stokes Raman scattering (CARS) spectroscopy. The mechanism of the resonance enhancement of vibration modes of the molecules adsorbed on graphene in CARS experiments is proposed. The possibility of appearance of the discrete breathing modes is discussed.
authors.affiliation: Department of Physics of Biological System, Institute of Physics, NAS of Ukraine, Prospect Nauky, 46, Kyiv, 03680, Ukraine, tanyalebedieva9@mail.ru.
authors.forename: Tetiana
authors.initials: T
authors.lastname: Lebedieva
authors.forename: Victor
authors.initials: V
authors.lastname: Gubanov
authors.forename: Galyna
authors.initials: G
authors.lastname: Dovbeshko
authors.forename: Denys
authors.initials: D
authors.lastname: Pidhirnyi