Title:
SWITCHABLE SUPERCONDUCTING JOSEPHSON JUNCTION DEVICE FOR LOW ENERGY INFORMATION STORAGE AND PROCESSING
Document Type and Number:
WIPO Patent Application WO/2019/060829
Kind Code:
A3
Abstract:
A switchable Josephson junction is provided that includes a plurality of ferromagnetic insulators (8, 12) that are defined by their respective magnetic alignments. A first superconducting layer (10) that is positioned between any two of the ferromagnetic insulators, wherein the conductive state is controlled by the relative magnetization orientation of the ferromagnetic insulators where the first superconducting layer is superconducting when the two magnetizations are aligned in antiparallel but it turns normally conducting when the magnetic alignment is parallel. A second superconducting layer (6) is adjacent one of the ferromagnetic layers, wherein Josephson tunneling occurs between the first superconducting layer and second superconducting layer across one of the ferromagnetic layers.
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Inventors:
MOODERA JAGADEESH S (US)
SANDOVAL JUAN PEDRO CASCALES (US)
TAKAMURA YOTA (US)
SANDOVAL JUAN PEDRO CASCALES (US)
TAKAMURA YOTA (US)
Application Number:
PCT/US2018/052435
Publication Date:
May 02, 2019
Filing Date:
September 24, 2018
Export Citation:
Assignee:
MASSACHUSETTS INST TECHNOLOGY (US)
International Classes:
H01L39/22
Foreign References:
| RU2554612C2 | 2015-06-27 |
Other References:
P. K. MUDULI: "Spin-polarized quasiparticle control in a double spin-filter tunnel junction", PHYSICAL REVIEW B, vol. 96, no. 2, 1 July 2017 (2017-07-01), XP055538125, ISSN: 2469-9950, DOI: 10.1103/PhysRevB.96.024514
YI ZHU ET AL: "Superconducting exchange coupling between ferromagnets", NATURE MATERIALS, vol. 16, no. 2, 19 September 2016 (2016-09-19), GB, pages 195 - 199, XP055537087, ISSN: 1476-1122, DOI: 10.1038/nmat4753
JOHN Q. XIAO ET AL: "Proximity Effects in Superconductor/Insulating-Ferromagnet NbN/GdN Multilayers", PHYSICAL REVIEW LETTERS, vol. 76, no. 10, 1 March 1996 (1996-03-01), US, pages 1727 - 1730, XP055538073, ISSN: 0031-9007, DOI: 10.1103/PhysRevLett.76.1727
MATTSON J E ET AL: "CRITICAL FIELDS OF FE4N/NBN FERROMAGNETIC/SUPERCONDUCTING MULTILAYERS", PHYSICAL REVIEW, B. CONDENSED MATTER, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 55, no. 1, PART 01, 1 January 1997 (1997-01-01), pages 70 - 73, XP000658488, ISSN: 0163-1829, DOI: 10.1103/PHYSREVB.55.70
R. M. OSGOOD ET AL: "Coexistence of magnetism and superconductivity in epitaxial GdN/W/NbN/W (100) and related NbN/W (100) multilayers", JOURNAL OF APPLIED PHYSICS, vol. 84, no. 2, 15 July 1998 (1998-07-15), US, pages 940 - 944, XP055538061, ISSN: 0021-8979, DOI: 10.1063/1.368169
YI ZHU ET AL: "Superconducting exchange coupling between ferromagnets", NATURE MATERIALS, vol. 16, no. 2, 19 September 2016 (2016-09-19), GB, pages 195 - 199, XP055537087, ISSN: 1476-1122, DOI: 10.1038/nmat4753
JOHN Q. XIAO ET AL: "Proximity Effects in Superconductor/Insulating-Ferromagnet NbN/GdN Multilayers", PHYSICAL REVIEW LETTERS, vol. 76, no. 10, 1 March 1996 (1996-03-01), US, pages 1727 - 1730, XP055538073, ISSN: 0031-9007, DOI: 10.1103/PhysRevLett.76.1727
MATTSON J E ET AL: "CRITICAL FIELDS OF FE4N/NBN FERROMAGNETIC/SUPERCONDUCTING MULTILAYERS", PHYSICAL REVIEW, B. CONDENSED MATTER, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 55, no. 1, PART 01, 1 January 1997 (1997-01-01), pages 70 - 73, XP000658488, ISSN: 0163-1829, DOI: 10.1103/PHYSREVB.55.70
R. M. OSGOOD ET AL: "Coexistence of magnetism and superconductivity in epitaxial GdN/W/NbN/W (100) and related NbN/W (100) multilayers", JOURNAL OF APPLIED PHYSICS, vol. 84, no. 2, 15 July 1998 (1998-07-15), US, pages 940 - 944, XP055538061, ISSN: 0021-8979, DOI: 10.1063/1.368169
Attorney, Agent or Firm:
CONNORS, Matthew E. et al. (US)
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