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

Abstract

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.

5 pages, 4 figures

References in corpus (6)

• Quantum interference between charge excitation paths in a solid state Mott insulator
• Measuring correlated electron dynamics with time-resolved photoemission spectroscopy
• Time-resolved photoemission of correlated electrons driven out of equilibrium
• Photoinduced charge and spin dynamics in strongly correlated electron systems
• Numerical Study of Photo-Induced Dynamics in Double-Exchange Model
• Photoinduced coherent oscillations in the one-dimensional two-orbital Hubbard model

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