DC--Transport in Quantum Wires
Yuval Oreg, Alexander M. Finkel'stein
TL;DR
This paper investigates how electron-electron interactions affect the DC conductance in one-dimensional quantum wires, revealing a universal conductance value and analyzing the impact of impurities and field renormalization.
Contribution
It provides a theoretical explanation for the universal conductance in quantum wires and examines the effects of impurities and interactions on conductance.
Findings
Universal conductance value of e^2/2πħ per mode in clean wires
Cancellation effect between interaction and electric field influence
Impact of impurity scattering on conductance renormalization
Abstract
The influence of electron--electron interaction on two terminal DC conductance of one--dimensional quantum wires is studied. A cancelation between the effect of the electron--electron interaction on the current and on the external electric field is the reason for the universal value, per mode, of the DC conductance of a clean wire. The effect of the renormalization of the electric field on the DC conductance in the presence of an interplay between the electron--electron interaction and backward scattering due to an impurity is considered.
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