Photo-induced spin-state change in itinerant correlated-electron system

Details Photo-induced spin-state change in itinerant correlated-electron system Photo-induced spin-state change in itinerant correlated-electron system

2011-03-03

arxiv.org/abs/1103.0608v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures

Scientific paper

Photo-induced spin-state change in itinerant correlated-electron system is studied. The model Hamiltonians before and after photon-pumping are derived from the two-orbital Hubbard model with crystalline field splitting. 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 optical absorption spectra in the photo-excited state. The resent results well explain the recent experimental results of the ultrafast optical spectroscopy in perovskite cobaltites.

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