Multiphonon Raman scattering in graphene

Article

关键词: CARBON NANOTUBES;    GRAPHITE;    SPECTRUM;    SINGLE;   

DOI  :  10.1103/PhysRevB.84.113406

来源: SCIE

【 摘 要 】

We report on multiphonon Raman scattering in graphene samples. Higher-order combination modes involving three and four phonons are observed in single-layer, bilayer, and few-layer graphene samples prepared by mechanical exfoliation. The intensity of the higher-order phonon modes (relative to the G peak) is highest in single-layer graphene and decreases with increasing layers. In addition, all higher-order modes are observed to upshift in frequency almost linearly with increasing graphene layers, betraying the underlying interlayer van der Waals interactions.

【 授权许可】

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