title: Photoinduced change in the charge order pattern in the quarter-filled organic conductor (EDO-TTF)2PF6 with a strong electron-phonon interaction.
abstract: The quasistable state in the photoinduced phase transition for the quasi-one-dimensional quarter-filled organic conductor (EDO-TTF)2PF6 has been examined by ultrafast reflective measurements and time-dependent model calculations incorporating both electron-electron and electron-phonon interactions. The transient optical conductivity spectrum over a wide probe photon-energy range revealed that photoexcitation induced a new type of charge-disproportionate state. Additionally, coherent and incoherent oscillations dependent on probe photon energies were found, as predicted by the calculation.
authors.affiliation: Nonequilibrium Dynamics Project, ERATO/JST, Tsukuba, Ibaraki 305-0801, Japan.
authors.forename: Ken
authors.initials: K
authors.lastname: Onda
authors.forename: Sho
authors.initials: S
authors.lastname: Ogihara
authors.forename: Kenji
authors.initials: K
authors.lastname: Yonemitsu
authors.forename: Nobuya
authors.initials: N
authors.lastname: Maeshima
authors.forename: Tadahiko
authors.initials: T
authors.lastname: Ishikawa
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Okimoto
authors.forename: Xiangfeng
authors.initials: X
authors.lastname: Shao
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Nakano
authors.forename: Hideki
authors.initials: H
authors.lastname: Yamochi
authors.forename: Gunzi
authors.initials: G
authors.lastname: Saito
authors.forename: Shin-Ya
authors.initials: SY
authors.lastname: Koshihara