Proximity effect in superconductor Aharonov Bohm loop hybrid structures

TL;DR

This paper investigates how various parameters influence the proximity effect in superconductor-Aharonov-Bohm loop hybrid structures using a self-consistent Bogoliubov-deGennes approach, revealing tunable effects.

Contribution

It provides a detailed analysis of the proximity effect modulation in superconductor-loop hybrids considering multiple physical parameters.

Findings

Parameters like magnetic flux and exchange field modulate the proximity effect.

Local density of states and pair amplitude are sensitive to loop size and chemical potential.

Persistent currents depend on the magnetic flux and loop geometry.

Abstract

We study the proximity effect in superconductor - metallic or ferromagnetic Aharonov Bohm loop hybrid structures self consistently using the Bogoliubov-deGennes formalism within the two dimensional extended Hubbard model. We calculate the local density of states, the pair amplitude, and persistent currents as a function of several modulation parameters, the position around the loop, the exchange field, the magnetic flux through the loop, the loop size, and the chemical potential in the loop atoms. We find that the parameters above can modulate the proximity effect.