title: Coherent "metallic" resistance and medium localization in a disordered one-dimensional insulator.
abstract: It is believed that a disordered one-dimensional (1D) wire with coherent electronic conduction is an insulator with the mean resistance <rho> approximately equal e(2L/xi) and resistance dispersion Delta(rho) approximately equal e(L/xi), where L is the wire length and xi is the electron localization length. Here we show that this 1D insulator undergoes at full coherence the crossover to a 1D "metal," caused by thermal smearing and resonant tunneling. As a result, Delta(rho) is smaller than unity and tends to be L/xi independent, while <rho> grows with L/xi first nearly linearly and then polynomially, manifesting the so-called medium localization.
authors.affiliation: Institute of Electrical Engineering, Slovak Academy of Sciences, Dúbravská cesta 9, 841 04 Bratislava, Slovakia.
authors.forename: Martin
authors.initials: M
authors.lastname: Mosko
authors.forename: Pavel
authors.initials: P
authors.lastname: Vagner
authors.forename: Michal
authors.initials: M
authors.lastname: Bajdich
authors.forename: Thomas
authors.initials: T
authors.lastname: Schäpers