Comment on “Temperature dependence of atomic vibrations in mono-layer graphene” [J. Appl. Phys. 118, 074302 (2015)]

Journal Article · Sun Feb 14 00:00:00 EST 2016 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4941385· OSTI ID:22495005

Kotakoski, J. ^[1]

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1. Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Vienna (Austria)

In an interesting recent study [Allen et al., J. Appl. Phys. 118, 074302 (2015)] (see also their Erratum [Allen et al., J. Appl. Phys. 118, 159902 (2015)]), Allen and co-workers measured the mean square amplitudes of graphene lattice vibrations between 100 and 1300 K and used a simplified theoretical approximation for the acoustic phonon modes to evaluate the maximum phonon wavelengths supported by the lattice. By fitting their data using the smallest wave-vector as the fitting parameter, they found this to be significantly smaller than the physical size of the graphene crystallites.

• OSTI ID: 22495005
• Journal Information: Journal of Applied Physics, Vol. 119, Issue 6; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLITUDES
APPROXIMATIONS
GRAPHENE
LATTICE VIBRATIONS
LAYERS
PHONONS
TEMPERATURE DEPENDENCE
VECTORS
WAVELENGTHS