Manipulating superconductivity in magnetic nanostructures in and out of equilibrium
Doctoral thesis
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2019Metadata
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- Institutt for fysikk [1693]
Abstract
We consider nanostructures that are constructed from superconducting, ferromagnetic, and spin–orbit-coupled materials. These structures are analyzed both theoretically and numerically, under both equilibrium and nonequilibrium conditions. Special emphasis is placed on how one can exert control over the superconducting properties of these systems. For instance, this includes developing new ways to toggle superconductivity on and off via electric or magnetic input signals, and new ways to shape the charge and spin supercurrents flowing through these systems. The thesis itself provides an introduction to how we performed our calculations, as well as a summary of some interesting research results. The main body of research consists of 15 enclosed publications, where we go into more detail on each specific project.
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Paper 1: Jacobsen, Sol; Ouassou, Jabir Ali; Linder, Jacob. Superconducting order in magnetic heterostructures. I: Advanced magnetic and optical materials. John Wiley & Sons 2016 ISBN 9781119241966. s. 1-46 Copyright © 2017 Scrivener Publishing LLC. All rights reserved. https://doi.org/10.1002/9781119241966.ch1Paper 2: Jacobsen, Sol; Ouassou, Jabir Ali; Linder, Jacob. Critical temperature and tunneling spectroscopy of superconductor-ferromagnet hybrids with intrinsic Rashba-Dresselhaus spin-orbit coupling. Physical Review B. Condensed Matter and Materials Physics 2015 ;Volum 92.(2) https://doi.org/10.1103/PhysRevB.92.024510
Paper 3: Ouassou, Jabir Ali; Di Bernardo, Angelo; Robinson, Jason W.A.; Linder, Jacob. Electric control of superconducting transition through a spin-orbit coupled interface. Scientific Reports 2016 ;Volum 6. This work is licensed under a Creative Commons Attribution 4.0 International License. (CC BY 4.0) https://doi.org/10.1038/srep29312
Paper 4: Banerjee, Niladri; Ouassou, Jabir Ali; Zhu, Yi; Stelmashenko, N. A.; Linder, Jacob; Blamire, Mark G.. Controlling the superconducting transition by spin-orbit coupling. Physical Review B 2018 ;Volum 97.(18) s. 184521-1-184521-8 https://doi.org/10.1103/PhysRevB.97.184521
Paper 5: Linder, Jacob; Amundsen, Morten; Ouassou, Jabir Ali. Microwave control of the superconducting proximity effect and minigap in magnetic and normal metals. Scientific Reports 2016 ;Volum 6 This work is licensed under a Creative Commons Attribution 4.0 International License. (CC BY 4.0) https://doi.org/10.1038/srep38739
Paper 6: Amundsen, Morten; Ouassou, Jabir Ali; Linder, Jacob. Analytically determined topological phase diagram of the proximity-induced gap in diffusive n-terminal Josephson junctions. Scientific Reports 2017 ;Volum 7. This work is licensed under a Creative Commons Attribution 4.0 International License. (CC BY 4.0) https://doi.org/10.1038/srep40578
Paper 7: Pal, Avradeep; Ouassou, Jabir Ali; Eschrig, Matthias; Linder, Jacob; Blamire, Mark G.. Spectroscopic evidence of odd frequency superconducting order. Scientific Reports 2017 ;Volum 7 This work is licensed under a Creative Commons Attribution 4.0 International License. (CC BY 4.0) https://doi.org/10.1038/srep40604
Paper 8: Ouassou, Jabir Ali; Pal, Avradeep; Blamire, Mark; Eschrig, Matthias; Linder, Jacob. Triplet Cooper pairs induced in diffusive s-wave superconductors interfaced with strongly spin-polarized magnetic insulators or half-metallic ferromagnets. Scientific Reports 2017 ;Volum 7.(1) This work is licensed under a Creative Commons Attribution 4.0 International License. (CC BY 4.0) https://doi.org/10.1038/s41598-017-01330-1
Paper 9: Ouassou, Jabir Ali; Jacobsen, Sol; Linder, Jacob. Conservation of spin supercurrents in superconductors. Physical Review B 2017 ;Volum 96.(9) https://doi.org/10.1103/PhysRevB.96.094505
Paper 10: Ouassou, Jabir Ali; Linder, Jacob. Spin-switch Josephson junctions with magnetically tunable sin(δφ/n) current-phase relation. Physical Review B 2017 ;Volum 96.(6) https://doi.org/10.1103/PhysRevB.96.064516
Paper 11: Lahabi, Kaveh; Amundsen, Morten; Ouassou, Jabir Ali; Beukers, Ewout; Pleijster, Menno; Linder, Jacob; Alkemade, Paul; Aarts, Jan. Controlling supercurrents and their spatial distribution in ferromagnets. Nature Communications 2017 ;Volum 8. - This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0) https://doi.org/10.1038/s41467-017-02236-2
Paper 12: Amundsen, Morten; Ouassou, Jabir Ali; Linder, Jacob. Field-free nucleation of antivortices and giant vortices in non-superconducting materials. Physical Review Letters 2018 ;Volum 120.(20) https://doi.org/10.1103/PhysRevLett.120.207001
Paper 13: Ouassou, Jabir Ali; Vethaak, Tom Doekle; Linder, Jacob. Voltage-induced thin-film superconductivity in high magnetic fields. Physical Review B 2018 ;Volum 98.(14) s. 1-15 https://doi.org/10.1103/PhysRevB.98.144509
Paper 14: Ouassou, J.A.; Linder,J.; Voltage control of superconducting exchange interaction and anomalous Josephson effect arXiv:1810.02820
Paper 15: Ouassou, J.A.; Robinson; J.W.A.; Linder,J.; Controlling spin supercurrents via nonequilibrium spin injection arXiv:1810.08623