title: Measurement of the nonlinear conducting states of α-(BEDT-TTF)2I3 using electronic Raman scattering.
abstract: Nonlinear conducting states in a strongly correlated organic electronic system α-(BEDT-TTF)2I3 [BEDT-TTF=bis(ethylenedithio)-tetrathiafulvalene] are studied by Raman spectroscopy. Wide-range Raman spectra of nonlinear conducing states provide direct information about conducting properties through the electronic Raman process. A comparison between the behaviors of the electronic modes of BEDT-TTF layers and the vibrational mode of I3 molecules reveals the formation of nonequilibrium states in which only the electronic parts show the change of states. We obtained a spatial map of the conducting regions of the nonlinear conducting states by utilizing the electronic Raman intensity as a measure of the highly conducting states. A spatially inhomogeneous formation of nonlinear conducting states was observed.
authors.affiliation: Department of Applied Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
authors.forename: Atsuya
authors.initials: A
authors.lastname: Ito
authors.forename: Yuto
authors.initials: Y
authors.lastname: Nakamura
authors.forename: Arao
authors.initials: A
authors.lastname: Nakamura
authors.forename: Hideo
authors.initials: H
authors.lastname: Kishida