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

Recent development in the fabrication of hybrid nanostructures allows for the creation of quantum interferometers that combine semiconductor and superconductor materials. We show that in those nanostructures, the joint phenomena of the 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 the quasiparticle coherence length in semiconductor-superconductor hybrids by a magnetoconductance measurement. Published under license by AIP Publishing.