Photoinduced change in the charge order pattern in the quarter-filled organic conductor (EDO-TTF)2PF6 with a strong electron-phonon interaction.
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.
Onda
Ken
K
Nonequilibrium Dynamics Project, ERATO/JST, Tsukuba, Ibaraki 305-0801, Japan.
Ogihara
Sho
S
Yonemitsu
Kenji
K
Maeshima
Nobuya
N
Ishikawa
Tadahiko
T
Okimoto
Yoichi
Y
Shao
Xiangfeng
X
Nakano
Yoshiaki
Y
Yamochi
Hideki
H
Saito
Gunzi
G
Koshihara
Shin-Ya
SY