International Business Machines Corporation
VERTICAL AL/EPI SI/AL, AND ALSO AL/AL OXIDE/AL, JOSEPHSON JUNCTION DEVICES FOR QUBITS

Abstract:

A vertical Josephson junction device includes a substrate, and an epitaxial stack formed on the substrate. The vertical Josephson junction device includes a first superconducting electrode embedded in the epitaxial stack, and a second superconducting electrode embedded in the epitaxial stack, the second superconducting electrode being separated from the first superconducting electrode by a dielectric layer. In operation, the first superconducting electrode, the dielectric layer, and the second superconducting electrode form a vertical Josephson junction.