title: Photoinduced change in the spin state of itinerant correlated electron systems.
abstract: A photoinduced spin-state change in the itinerant correlated electron system is studied. A photon introduced in the low-spin band insulator induces a bound state of the high-spin state and a photoexcited hole. This bound state brings a characteristic peak in the pump-probe optical absorption spectra which are completely different from the spectra in thermal-excited states. The present results well explain the recent experiments of the ultrafast optical spectroscopy in perovskite cobaltites.
authors: Department of Physics, Tohoku University, Sendai, Japan.
authors: Y
authors: Y
authors: Kanamori
authors: H
authors: H
authors: Matsueda
authors: S
authors: S
authors: Ishihara