Electronic transport through a correlated quantum wire connected to a superconducting lead

TL;DR

This paper theoretically investigates electron transport in a one-dimensional quantum wire connected to superconducting and normal leads, highlighting the effects of electron interactions and external voltages on conductance and impedance.

Contribution

It introduces a model for electron transport in a correlated quantum wire with superconducting contacts, analyzing the impact of interactions and ac/dc voltages on transport properties.

Findings

AC voltage modifies the I-V characteristics resembling photon-assisted tunneling.

Electron-electron interactions decrease conductance at low voltages.

Interactions influence the frequency dependence of the impedance.

Abstract

We study theoretically the electron transport in a 1D conductor adiabatically connected to a superconducting and normal metal leads. In the case of non-interacting we show that ac voltage applied along with dc voltage modifies I-V curve resembling a regime of photon-assisted tunneling. We obtain in the limit of low voltages, that the electron-electron interaction affects electronic transport resulting in a decrease of conductance and features in the frequency dependence of the impedance.