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  Non-Majorana modes in diluted spin chains proximitized to a superconductor

Küster, F., Brinker, S., Hess, R., Loss, D., Parkin, S. S. P., Klinovaja, J., et al. (2022). Non-Majorana modes in diluted spin chains proximitized to a superconductor. Proceedings of the National Academy of Sciences of the United States of America, 119(42): e2210589119. doi:10.1073/pnas.2210589119.

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Datensatz-Permalink: https://hdl.handle.net/21.11116/0000-000B-79E3-D Versions-Permalink: https://hdl.handle.net/21.11116/0000-000B-79E4-C
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2022
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 Urheber:
Küster, Felix1, Autor           
Brinker, Sascha2, Autor
Hess, Richard2, Autor
Loss, Daniel2, Autor
Parkin, Stuart S. P.1, Autor                 
Klinovaja, Jelena2, Autor
Lounis, Samir2, Autor
Sessi, Paolo1, Autor                 
Affiliations:
1Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society, ou_3287476              
2External Organizations, ou_persistent22              

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 Zusammenfassung: Spin chains proximitized with superconducting condensates have emerged as one of the most promising platforms for the realization of Majorana modes. Here, we craft diluted spin chains atom by atom following a seminal theoretical proposal suggesting indirect coupling mechanisms as a viable route to trigger topological superconductivity. Starting from single adatoms hosting deep Shiba states, we use the highly anisotropic Fermi surface of the substrate to create spin chains characterized by different magnetic configurations along distinct crystallographic directions. By scrutinizing a large set of parameters we reveal the ubiquitous emergence of boundary modes. Although mimicking signatures of Majorana modes, the end modes are identified as topologically trivial Shiba states. Our work demonstrates that zero-energy modes in spin chains proximitized to superconductors are not necessarily a link to Majorana modes while simultaneously identifying other experimental platforms, driving mechanisms, and test protocols for the determination of topologically nontrivial superconducting phases.

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 Datum: 2022-10-102022
 Publikationsstatus: Erschienen
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 Identifikatoren: DOI: 10.1073/pnas.2210589119
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Titel: Proceedings of the National Academy of Sciences of the United States of America
  Andere : PNAS
  Andere : Proceedings of the National Academy of Sciences of the USA
  Kurztitel : Proc. Natl. Acad. Sci. U. S. A.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Washington, D.C. : National Academy of Sciences
Seiten: - Band / Heft: 119 (42) Artikelnummer: e2210589119 Start- / Endseite: - Identifikator: ISSN: 0027-8424
CoNE: https://pure.mpg.de/cone/journals/resource/954925427230