Josephson junction with spacer

US9929334B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Josephine B. Chang · Mahopac, US
• Michael A. Guillorn · Locke, US
• Ryan M. Martin · New York, US
• Jeffrey W. Sleight · Ridgefield, US

Key dates

• Filing date: Jan 15, 2015
• Grant date: Mar 27, 2018
• Expiry date: Jul 18, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N60/0912

Abstract

Various embodiments are directed toward a circuit configured to act as a Josephson junction. The circuit includes: a junction stack on a substrate, the junction stack including a portion of a first superconductor electrode, with an interface layer on a top side of the first superconductor electrode and configured to act as a tunneling barrier for the junction stack. The circuit may also comprise a first portion of a second superconductor electrode on top of the interface layer. A spacer may separate the portion of the first superconductor electrode in the junction stack from a second portion of the second superconductor electrode outside the junction stack where the second superconductor electrode overlays the first superconductor electrode.