Ultrafast light induced charge disordering around phase transition temperature in 2D spin ladder compound

摘要

The light induced phenomena on charge-ordered phase in NaV_2O_5 has been investigated by femtosecond time-resolved reflection spectroscopy. A large reflectivity change with a rise time of 10 ps and a decay time of several hundreds picoseconds has been observed and ascribed to a photo-induced phase transition accompanying a destruction of the charge order.