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Manifestation of LO-LA phonons in Raman scattering in graphene

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Manifestation of LO-LA phonons in Raman scattering in graphene. / Ferone, Raffaello; Wallbank, John R.; Zolyomi, Viktor; McCann, Edward; Falko, Vladimir.

In: Solid State Communications, Vol. 151, No. 16, 01.08.2011, p. 1071-1074.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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Ferone, Raffaello ; Wallbank, John R. ; Zolyomi, Viktor ; McCann, Edward ; Falko, Vladimir. / Manifestation of LO-LA phonons in Raman scattering in graphene. In: Solid State Communications. 2011 ; Vol. 151, No. 16. pp. 1071-1074.

Bibtex

@article{b5037b1c3abb4deeba0ecb88b2c6a05d,
title = "Manifestation of LO-LA phonons in Raman scattering in graphene",
abstract = "We analyze the spectral density of Raman scattering in graphene accompanied by the emission of a pair of LO or LA phonons from the corner of the Brillouin zone. Using a minimal tight-binding model approach, we find that the lineshape of the corresponding Raman signal consists of two peaks with a strongly non-Lorentzian (almost triangular) form with their width and the splitting between the peaks being strongly dependent on the energy of the incoming photon. The asymmetric lineshape is determined by the kinematics of the fully-resonant two-phonon process, and it reflects a strong anisotropy of LO–LA phonons{\textquoteright} dispersion around the Brillouin zone corners.",
keywords = "A. Graphene, A. Carbon , D. Electron–phonon interactions , E. Raman spectroscopy",
author = "Raffaello Ferone and Wallbank, {John R.} and Viktor Zolyomi and Edward McCann and Vladimir Falko",
year = "2011",
month = aug,
day = "1",
doi = "10.1016/j.ssc.2011.05.017",
language = "English",
volume = "151",
pages = "1071--1074",
journal = "Solid State Communications",
issn = "0038-1098",
publisher = "Elsevier Limited",
number = "16",

}

RIS

TY - JOUR

T1 - Manifestation of LO-LA phonons in Raman scattering in graphene

AU - Ferone, Raffaello

AU - Wallbank, John R.

AU - Zolyomi, Viktor

AU - McCann, Edward

AU - Falko, Vladimir

PY - 2011/8/1

Y1 - 2011/8/1

N2 - We analyze the spectral density of Raman scattering in graphene accompanied by the emission of a pair of LO or LA phonons from the corner of the Brillouin zone. Using a minimal tight-binding model approach, we find that the lineshape of the corresponding Raman signal consists of two peaks with a strongly non-Lorentzian (almost triangular) form with their width and the splitting between the peaks being strongly dependent on the energy of the incoming photon. The asymmetric lineshape is determined by the kinematics of the fully-resonant two-phonon process, and it reflects a strong anisotropy of LO–LA phonons’ dispersion around the Brillouin zone corners.

AB - We analyze the spectral density of Raman scattering in graphene accompanied by the emission of a pair of LO or LA phonons from the corner of the Brillouin zone. Using a minimal tight-binding model approach, we find that the lineshape of the corresponding Raman signal consists of two peaks with a strongly non-Lorentzian (almost triangular) form with their width and the splitting between the peaks being strongly dependent on the energy of the incoming photon. The asymmetric lineshape is determined by the kinematics of the fully-resonant two-phonon process, and it reflects a strong anisotropy of LO–LA phonons’ dispersion around the Brillouin zone corners.

KW - A. Graphene

KW - A. Carbon

KW - D. Electron–phonon interactions

KW - E. Raman spectroscopy

U2 - 10.1016/j.ssc.2011.05.017

DO - 10.1016/j.ssc.2011.05.017

M3 - Journal article

VL - 151

SP - 1071

EP - 1074

JO - Solid State Communications

JF - Solid State Communications

SN - 0038-1098

IS - 16

ER -