Josephson

The superconductors and topological insulators were coupled to form a so-called Josephson junction, a connection between two superconductors separated by a thin layer of non-superconducting material.

Specifically, they had a look at the niobium Josephson junction.

The Josephson junction is the information-processing heart of the superconducting qubit.

The Josephson junction is structured like a sandwich, consisting of a layer of nonconducting material squeezed between two layers of superconducting metal.

The typical, trusty aluminum Josephson junction is made of two layers of aluminum and a middle layer of aluminum oxide.