Substrate dependence of cyclotron resonance on large-area CVD graphene

• Energy of cyclotron resonance (CR) exhibits B-dependence on single-layer CVD graphene.
• The CR behavior of the graphene is significantly affected by supporting substrate.
• The band velocity of the graphene on GaAs substrate is enhanced from that on glass.

Cyclotron resonance has been investigated on single-layer large-area graphene which was synthesized by chemical vapor deposition. Absorption peaks of the cyclotron resonance are clearly observed on the graphene sample and these peak energies exhibit B-dependence in terms of an unequally spaced Landau Level structure in Dirac fermions. We find significant substrate dependence of the band velocity c˜. The derived c˜ of the sample on a GaAs substrate is enhanced by about 10% from that on a glass substrate which almost coincides with that of the multi-layer epitaxial graphene, indicating that the c˜ is strongly affected by the condition of the substrate.