Relaxation Dynamics of Carriers in Graphene

We study the damping of anomalous Rabi oscillations in monolayer graphene by means of electron-phonon interaction. Our calculations show that the electron-phonon interaction led to the novel incoherent anomalous Rabi oscillations in graphene. Conventional Rabi oscillations occur near resonance show an energy relaxation discussed elsewhere. Anomalous Rabi oscillations display almost zero energy relaxation in the presence of long-wavelength phonons at the Dirac point in the first Brillouin zone. The role of electron-phonon interaction in dephasing of anomalous Rabi oscillations is prominent far away from the Dirac point. There are huge numbers of anomalous Rabi cycles present near the Dirac point.