Strong enhancements to superconducting properties of 1D systems from metallic reservoirs

TL;DR

This study demonstrates how metallic reservoirs can significantly enhance superconductivity in one-dimensional systems through reservoir-mediated effects, approaching long-range order.

Contribution

It reveals the mechanisms by which metallic reservoirs boost superconductivity in 1D systems using advanced many-body numerical methods.

Findings

Metallic reservoirs increase superconducting susceptibility.

Tuning metal parameters enhances pair-pair coupling.

1D systems can approach superconducting long-range order.

Abstract

Using a 1D bilayer system comprised of pairing and metallic layers, the present work proves the striking power of reservoir-mediated boosting of superconductivity. Employing many-body numerics on large systems at zero and finite temperature, we unravel the complex processes by which the tuning of the metal parameters can impact the effective pairing strength as well as the long-range pair-pair-coupling mediated by the metal. It is these two processes that in turn can strongly enhance superconducting susceptibility and thermal superconducting correlation length over those of the isolated system. We show that in this way, even a 1D system can come very close to achieving superconducting long-range order.