title: Collapse of charge order in a quasi-one-dimensional organic conductor with a quarter-filled band.
abstract: A charge-ordered insulator, (DI-DCNQI)2Ag, with a quasi-one-dimensional quarter-filled band is metallized by pressure. It was found that the charge order melts into a curious metallic state with cubic-temperature dependence of the resistivity, which implies the unprecedented mechanism of the electron-electron scattering. We constructed the pressure-temperature phase diagram, where the melting line has a tricritical point dividing the second-order line at low pressures and the first-order line at high pressures just before it vanishes.
authors.affiliation: Department of Applied Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Itou
authors.forename: K
authors.initials: K
authors.lastname: Kanoda
authors.forename: K
authors.initials: K
authors.lastname: Murata
authors.forename: T
authors.initials: T
authors.lastname: Matsumoto
authors.forename: K
authors.initials: K
authors.lastname: Hiraki
authors.forename: T
authors.initials: T
authors.lastname: Takahashi