Technologies Available for License

2019-005: Superconducting qubit devices based on metal silicides

Invention: 2019-005

Patent Status: U.S. Patent Number 11,355,690 was issued on June 7, 2022

For technical and licensing related questions, email tcp@bnl.gov.

Summary

Josephson junction, a quantum mechanical device has two layers of superconducting layers that are separated by a thin non-superconducting material. Electronic circuits can be built from Josephson junctions, especially digital logic circuitry. Many researchers are working on building ultrafast computers using Josephson logic. The transmon device architecture, implemented for example using Aluminum/Aluminum Oxide/Aluminum junctions, has been studied and is the basis of current qubit technology. However, achieving high quality superconductor-silicon interfaces, and identifying compatible superconductors with higher TC and other tunable attributes, is still a challenge. The invention describes Josephson junctions based on transition metal silicide (TMSi)/silicon/TMSi heterojunctions for silicide-based qubit devices.

Description

Describes a silicide-based qubit device with three components; a doped silicon substrate or a back gate, a layer of silicon oxide disposed atop the silicon substrate or a gate oxide disposed atop the back gate, and a heterojunction of TMSi/silicon/TMSi, fabricated disposed atop the silicon oxide layer or the gate oxide.

Journal Publication & Intellectual Property

• US 11,355,690 B2 (.pdf)