Ultrafast Photoinduced Formation of Metallic State in a Perovskite-type Manganite with Short Range Charge and Orbital Order

Abstract

Femtosecond reflection spectroscopy was performed on a perovskite-type manganite, Gd0.55Sr0.45MnO3, with the short-range charge and orbital order (CO/OO). Immediately after the photoirradiation, a large increase of the reflectivity was detected in the mid-infrared region. The optical conductivity spectrum under photoirradiation obtained from the Kramers-Kronig analyses of the reflectivity changes demonstrates a formation of a metallic state. This suggests that ferromagnetic spin arrangements occur within the time resolution (ca. 200 fs) through the double exchange interaction, resulting in an ultrafast CO/OO to FM switching.

arXiv comment4 figures

Cited by in corpus (5)

• Photoinduced charge and spin dynamics in strongly correlated electron systems
• Numerical Study of Photo-Induced Dynamics in Double-Exchange Model
• Polaronic transport induced by competing interfacial magnetic order in a La${}_{0.7}$Ca${}_{0.3}$MnO${}_3$/BiFeO${}_3$ heterostructure
• Correlating Quasi-Electron Relaxation with Quantum Femtosecond Magnetism in the Order Parameter Dynamics of Insulating Manganites
• Photoinduced insulator-metal transition and nonlinear optical response of correlated electrons -- a DMFT analysis