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Supercurrent Detection of Topologically Trivial Zero-Energy States in Nanowire Junctions
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.
2019 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 123, no 11, article id 117001Article in journal (Refereed) Published
Abstract [en]

We report the emergence of zero-energy states in the trivial phase of a short nanowire junction with a strong spin-orbit coupling and magnetic field, formed by strong coupling between the nanowire and two superconductors. The zero-energy states appear in the junction when the superconductors induce a large energy shift in the nanowire, such that the junction naturally forms a quantum dot, a process that is highly tunable by the superconductor width. Most importantly, we demonstrate that the zero-energy states produce a re shift in the phase-biased supercurrent, which can be used as a simple tool for their unambiguous detection, ruling out any Majorana-like interpretation.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2019. Vol. 123, no 11, article id 117001
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-395315DOI: 10.1103/PhysRevLett.123.117001ISI: 000485315000011PubMedID: 31573272OAI: oai:DiVA.org:uu-395315DiVA, id: diva2:1362198
Funder
Swedish Research CouncilSwedish Foundation for Strategic Research Knut and Alice Wallenberg FoundationAvailable from: 2019-10-18 Created: 2019-10-18 Last updated: 2019-10-18Bibliographically approved

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Awoga, OladunjoyeCayao, JorgeBlack-Schaffer, Annica M.

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