  We theoretically propose a method to enhance Raman scattering by injecting a
seeded light field which is correlated with the initially prepared atomic spin
wave. Such a light-atom correlation leads to an interference in the Raman
scattering. The interference is sensitive to the relative phase between the
seeded light field and initially prepared atomic spin wave. For constructive
interference, the Raman scattering is greatly enhanced. Such an enhanced Raman
scattering may find applications in quantum information, nonlinear optics and
optical metrology due to its simplicity.
