Four-terminal resistance of an interacting quantum wire with weakly invasive contacts |
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Authors: | Aita Hugo Arrachea Liliana Naón Carlos |
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Institution: | Departamento de Física and IFLP, FCE, Universidad Nacional de La Plata, cc 67 (1900) La Plata, Argentina. |
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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. |
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