title: Four-terminal resistance of an interacting quantum wire with weakly invasive contacts.
abstract: We analyze the behavior of the four-terminal resistance, relative to the two-terminal resistance of an interacting quantum wire with an impurity, taking into account the invasiveness of the voltage probes. We consider a one-dimensional Luttinger model of spinless fermions for the wire. We treat the coupling to the voltage probes perturbatively, within the framework of non-equilibrium Green function techniques. Our investigation unveils the combined effect of impurities, electron-electron interactions and invasiveness of the probes on the possible occurrence of negative resistance.
authors: Departamento de Física and IFLP, FCE, Universidad Nacional de La Plata, cc 67 (1900) La Plata, Argentina.
authors: Hugo
authors: H
authors: Aita
authors: Liliana
authors: L
authors: Arrachea
authors: Carlos
authors: C
authors: Naón