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Disorder robustness and protection of Majorana bound states in ferromagnetic chains on conventional superconductors
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
2017 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 95, no 18, article id 184511Article in journal (Refereed) Published
Abstract [en]

Majorana bound states (MBSs) are well established in the clean limit in chains of ferromagnetically aligned impurities deposited on conventional superconductors with finite spin-orbit coupling. Here we show that these MBSs are very robust against disorder. By performing self-consistent calculations we find that the MBSs are protected as long as the surrounding superconductor show no large signs of inhomogeneity. We also find that longer chains offer more stability against disorder for the MBSs, albeit the minigap decreases, as do increasing strengths of spin-orbit coupling and superconductivity.

Place, publisher, year, edition, pages
2017. Vol. 95, no 18, article id 184511
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-359620DOI: 10.1103/PhysRevB.95.184511ISI: 000440617700003OAI: oai:DiVA.org:uu-359620DiVA, id: diva2:1245825
Funder
Swedish Research CouncilSwedish Foundation for Strategic Research Knut and Alice Wallenberg FoundationGöran Gustafsson Foundation for promotion of scientific research at Uppala University and Royal Institute of TechnologyAvailable from: 2018-09-06 Created: 2018-09-06 Last updated: 2018-09-06Bibliographically approved

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Awoga, OladunjoyeBjörnson, KristoferBlack-Schaffer, Annica M.

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