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Title: Brillouin scattering study of low-frequency bulk acoustic phonons in multilayer graphene
Authors: Wang, Z.K. 
Lim, H.S. 
Ng, S.C. 
Özyilmaz, B. 
Kuok, M.H. 
Issue Date: Dec-2008
Citation: Wang, Z.K., Lim, H.S., Ng, S.C., Özyilmaz, B., Kuok, M.H. (2008-12). Brillouin scattering study of low-frequency bulk acoustic phonons in multilayer graphene. Carbon 46 (15) : 2133-2136. ScholarBank@NUS Repository.
Abstract: The low-frequency acoustic dynamics of multilayer graphene flakes, on SiO2/Si substrate, have been studied by polarized Brillouin light scattering. Interference enhancement affords the first observation of both the in-plane longitudinal and transverse acoustic bulk modes near the Γ-point of the Brillouin zone. The experimental data yielded information on the acoustic and elastic properties of multilayer graphene. Additionally, the measured phonon dispersion is found to be in good accordance with that evaluated for graphene, based on first-principles calculations within the generalized gradient approximation. Our findings strongly suggest that the interaction between layers in multilayer graphene is weak. © 2008 Elsevier Ltd. All rights reserved.
Source Title: Carbon
ISSN: 00086223
DOI: 10.1016/j.carbon.2008.09.028
Appears in Collections:Staff Publications

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