Preparation and properties of amorphous MgB$_2$/MgO superstructures: A new model disordered superconductor

TL;DR

This paper presents a new fabrication method for amorphous MgB$_2$/MgO multilayers, creating a novel disordered superconductor model with high transition temperatures and quasi-two-dimensional superconductivity.

Contribution

Introduces a novel fabrication technique for MgB$_2$/MgO multilayers that serve as a new model for disordered superconductors with tunable properties.

Findings

Achieved high transition temperatures in amorphous MgB$_2$/MgO multilayers.

Demonstrated quasi-two-dimensional superconductivity with controlled anisotropy.

Showed that properties vary with layer thickness.

Abstract

In this paper we introduce a novel method for fabricating MgB$_2$/MgO multilayers and demonstrate the potential for using them as a new model for disordered superconductors. In this approach we control the annealing of the MgB$_2$ to yield an interesting new class of disordered (amorphous) superconductors with relatively high transition temperatures. The multilayers appear to exhibit quasi-two-dimensional superconductivity with controlled anisotropy. We discuss the properties of the multilayers as the thickness of the components of the bilayers vary.