Abstract
We describe a peculiar fine structure acquired by the in-plane optical phonon at the point in graphene when it is brought into resonance with one of the inter-Landau-level transitions in this material. The effect is most pronounced when this lattice mode (associated with the band in graphene Raman spectrum) is in resonance with inter-Landau-level transitions , 1 and , at a magnetic field . It can be used to measure the strength of the electron-phonon coupling directly, and its filling-factor dependence can be used experimentally to detect circularly polarized lattice vibrations.
- Received 9 April 2007
DOI:https://doi.org/10.1103/PhysRevLett.99.087402
©2007 American Physical Society