Superconductivity of interface layer at contact between normal metal and high temperature superconductor

TL;DR

This study demonstrates the conditions under which superconductivity can occur at the interface between a normal metal and a high-temperature superconductor, influenced by temperature, magnetic field, and current.

Contribution

It provides experimental evidence for the physical conditions necessary to induce superconductivity in the interface layer of N-G-S multilayer systems.

Findings

Superconductivity can be initiated at the N-G interface under certain conditions.

Electrical resistance of the interface layer is affected by temperature, magnetic field, and current.

Experimental data supports the existence of returning superconductivity in the interface layer.

Abstract

In this research, it is shown that there are the necessary physical conditions to originate the returning superconductivity in the thin interface layer at the contact between the normal metal and the high temperature superconductor (N-S contact). The influences by the temperature T, magnetic field H and direct current I on the electrical resistance RG of the thin interface layer G in the multilayered system N-G-S, where N can be one the normal metal layers of Argentum (Ag), Indium (In), Gallium-Indium (Ga-50%In), G is the thin interface layer, S is the high temperature superconductor (HTS) layer of YBa2Cu3O7-x, are researched experimentally.