Electron-electron interaction effects on transport through mesoscopic superconducting hybrid junctions

TL;DR

This paper reviews how electron-electron interactions influence transport in mesoscopic superconductor-normal metal hybrid junctions, focusing on one-dimensional quantum wires described by Luttinger liquid theory and their potential for spintronics applications.

Contribution

It provides a comprehensive overview of the effects of electron-electron interactions on transport properties in superconductor-quantum wire hybrids, highlighting novel phenomena and applications.

Findings

Electron-electron interactions significantly modify transport in hybrid junctions.

Potential for generating pure spin currents in such systems.

Enhanced tunnelling magnetoresistance due to interactions.

Abstract

Effects due to the proximity of a superconductor has motivated a lot of research work in the last several decades both from theoretical and experimental point of view. In this review we are going to describe the physics of systems containing normal metal-superconductor interface. Mainly we discuss transport properties through such hybrid structures. In particular, we describe the effects of electron electron interaction on transport through such superconducting junction of multiple one-dimensional quantum wires. The latter can be described in terms of a non-Fermi liquid theory called Luttinger liquid. In this review, from the application point of view, we also demonstrate the possible scenarios for production of pure spin current and large tunnelling magnetoresistance in such hybrid junctions and analyze the influence of electron-electron interaction on the stability of the production of pure spin current.