title: Early-stage dynamics of light-matter interaction leading to the insulator-to-metal transition in a charge ordered organic crystal.
abstract: Ultrafast dynamics of the light-matter interaction in a charge-ordered molecular insulator α-(BEDT-TTF)2I3 were studied by pump-probe spectroscopy using few-optical-cycle infrared pulses (pulse width 12 fs). Coherent oscillation of the correlated electrons and subsequent Fano destructive interference with intramolecular vibration were observed in time domain; the results indicated a crucial role for electron-electron interplay in the light-matter interaction leading to the photoinduced insulator-to-metal transition. The qualitative features of this correlated electron motion were reproduced by calculations based on exact many-electron-phonon wave functions.
authors.affiliation: Department of Physics, Tohoku University, Sendai 980-8578, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kawakami
authors.forename: T
authors.initials: T
authors.lastname: Fukatsu
authors.forename: Y
authors.initials: Y
authors.lastname: Sakurai
authors.forename: H
authors.initials: H
authors.lastname: Unno
authors.forename: H
authors.initials: H
authors.lastname: Itoh
authors.forename: S
authors.initials: S
authors.lastname: Iwai
authors.forename: T
authors.initials: T
authors.lastname: Sasaki
authors.forename: K
authors.initials: K
authors.lastname: Yamamoto
authors.forename: K
authors.initials: K
authors.lastname: Yakushi
authors.forename: K
authors.initials: K
authors.lastname: Yonemitsu