Probing Andreev reflection reach in semiconductor-superconductor hybrids by Aharonov-Bohm effect

TL;DR

This paper proposes using Aharonov-Bohm effect combined with Andreev reflections in hybrid nanostructures to measure the quasiparticle coherence length via magnetoconductance, advancing quantum interferometry techniques.

Contribution

It introduces a novel method to determine the electron retro-reflection length in semiconductor-superconductor hybrids using quantum interference effects.

Findings

Demonstrates the feasibility of probing Andreev reflection reach

Proposes a magnetoconductance measurement technique

Links interference phenomena to quasiparticle coherence length

Abstract

Recent development in fabrication of hybrid nanostructures allows for creation of quantum interferometers that combine semiconductor and superconductor materials. We show that in those nanostructures the joint phenomena of Aharonov-Bohm effect and Andreev reflections can be used to determine the length on which the electron is retro-reflected as a hole. We propose to exploit this feature for probing of the quasiparticle coherence length in semiconductor-superconductor hybrids by a magnetoconductance measurement.