Magnetic Oscillation of Optical Phonon in Graphene

Tsuneya Ando
2007 Journal of the Physical Society of Japan  
The frequency shift and broadening of long-wavelength optical phonons due to interactions with electrons are calculated in a monolayer graphene in magnetic fields. The broadening is resonantly enhanced and the frequency shift exhibits a rapid change when the phonon energy becomes the energy separation of Landau levels between which optical transitions are allowed.
doi:10.1143/jpsj.76.024712 fatcat:2muk5ovqjzgvnh5m5cqgy7wsfa