Amorphous superconducting alloys for superconducting circuits

Patent metadata

Field	Value
Publication number	US-12102016-B2
Application number	US-202016918708-A
Country	US
Kind code	B2
Filing date	Jul 1, 2020
Priority date	Jul 1, 2020
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

Techniques facilitating formation of amorphous superconducting alloys for superconducting circuits are provided. A device can comprise one or more superconducting components that comprise an amorphous superconducting alloy comprising two or more elements. At least one element of the two or more elements is a superconducting element.

First claim

What is claimed is:

1. A quantum circuit, comprising:
one or more superconducting components that comprise an amorphous superconducting alloy comprising at least three elements, wherein at least one element of the at least three elements is superconducting, and wherein the at least three elements comprise one of:
a first combination of elements comprising vanadium and two different elements selected from a first group consisting of yttrium, lanthanum, zirconium, and scandium,
a second combination of elements comprising niobium and two different elements selected from the first group,
a third combination of elements comprising tantalum and two different elements selected from the first group, or
a fourth combination of elements comprising lanthanum two different elements selected from a second group consisting of vanadium, niobium, tantalum, molybdenum, tungsten, and rhenium.

2. The quantum circuit of claim 1 , wherein a first element of the at least three elements comprises a first crystal structure, and a second element of the at least three elements comprises a second crystal structure different from the first crystal structure.

3. The quantum circuit of claim 1 , wherein a first element of the at least three elements comprises a first atomic size, and a second element of the at least three elements comprises a second atomic size different from the first atomic size.

4. The quantum circuit of claim 1 , wherein the amorphous superconducting alloy further comprises aluminum.

5. The quantum circuit of claim 1 , wherein the amorphous superconducting alloy further comprises tin.

6. The quantum circuit of claim 1 , wherein a first element of the at least three elements is superconducting at a defined temperature range and a second element of the at least three elements is not superconducting at the defined temperature range.

7. The quantum circuit of claim 1 , wherein the amorphous superconducting alloy further comprises indium.

8. A device, comprising:
one or more superconducting components that comprise an amorphous superconducting alloy comprising at least three elements, wherein at least one element of the at least three elements is superconducting, and wherein the at least three elements comprise one of:
a first combination of elements comprising vanadium and two different elements selected from a first group consisting of yttrium, lanthanum, zirconium, and scandium,
a second combination of elements comprising niobium and two different elements selected from the first group,
a third combination of elements comprising tantalum and two different elements selected from the first group, or
a fourth combination of elements comprising lanthanum two different elements selected from a second group consisting of vanadium, niobium, tantalum, molybdenum, tungsten, and rhenium.

9. The device of claim 8 , wherein a first element of the at least three elements comprises a first crystal structure, and a second element of the at least three elements comprises a second crystal structure different from the first crystal structure.

10. The device of claim 8 , wherein a first element of the at least three elements comprises a first atomic size, and a second element of the at least three elements comprises a second atomic size different from the first atomic size.

11. The device of claim 8 , wherein the amorphous superconducting alloy further comprises aluminum.

12. The device of claim 8 , wherein the amorphous superconducting alloy further comprises tin.

13. The device of claim 8 , wherein a first element of the at least three elements is superconducting at a defined temperature range and a second element of the at least three elements is not superconducting at the defined temperature range.

14. The device of claim 8 , wherein the amorphous superconducting alloy further comprises indium.

15. A method, comprising:
selecting a combination of at least three elements, wherein at least one element of the at least three elements is superconducting, and wherein the combination comprises one of:
a first combination of elements comprising vanadium and two different elements selected from a first group consisting of yttrium, lanthanum, zirconium, and scandium,
a second combination of elements comprising niobium and two different elements selected from the first group,
a third combination of elements comprising tantalum and two different elements selected from the first group, or
a fourth combination of elements comprising lanthanum two different elements selected from a second group consisting of vanadium, niobium, tantalum, molybdenum, tungsten, and rhenium; and

forming amorphous superconducting components using the combination of at least three elements, wherein the amorphous superconducting components are adapted to interface with one or more quantum components of a quantum circuit.

16. The method of claim 15 , wherein the combination of at least three elements further comprises aluminum.

17. The method of claim 15 , further comprising depositing the two or more elements on a room temperature substrate using a sputtering process.

18. The method of claim 15 , wherein a first element of the at least three elements comprises a first crystal structure, and a second element of the at least three elements comprises a second crystal structure different from the first crystal structure.

19. The method of claim 15 , wherein the combination of at least three elements further comprises indium.

20. The method of claim 15 , wherein a first element of the at least three elements comprises a first atomic size, and a second element of the at least three elements comprises a second atomic size different from the first atomic size.

Assignees

• Lavoie Christian
• Wymore Benjamin
• Brink Markus
• Brown Stephen L
• IBM

Inventors

• Lavoie Christian
• Wymore Benjamin
• Brink Markus
• Brown Stephen L

Classifications

• H10N60/01

  Manufacture or treatment · CPC title

• H10N99/05

  Devices based on quantum mechanical effects, e.g. quantum interference devices or metal single-electron transistors · CPC title

• H10N60/0408

  by sputtering · CPC title

• G06N10/40

  Physical realisations or architectures of quantum processors or components for manipulating qubits, e.g. qubit coupling or qubit control · CPC title

• H10N60/85 Primary

  Superconducting active materials · CPC title