Abstract
We present a theoretical study of photo-induced dynamics in a correlated electron system where electronic charge couples with spin and lattice. This is motivated by the recent experiments in perovskite manganites and related compounds. The generalized double exchange model is analyzed by utilizing the two complementary methods, the exact diagonalization and inhomogeneous Hartree-Fock methods. Time evolutions of the optical absorption spectra, spin correlation, and charge correlation are calculated. It is shown that photo-induced dynamics in this system is governed by strong coupling between itinerant electrons and localized spins.
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