Technologies Available for License
Category: advanced materials
2019-005: Superconducting qubit devices based on metal silicides
Patent Status: U.S. Patent Number 11,355,690 was issued on June 7, 2022
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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.
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.
Benefits of the silicide-based qubit device include use of TMSi superconductors for qubit devices, the use of TMSi/silicon/TMSi heterojunctions as Josephson junctions, and the use of horizontal TMSi/Si interface to achieve high critical current across Josephson junction.
Applications and Industries
For making superconducting solid-state electronic circuits.
Journal Publication & Intellectual Property
- US 11,355,690 B2 (.pdf)