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  Magnon-mediated topological superconductivity in a quantum wire

Boström, F. V., & Viñas Boström, E. (2024). Magnon-mediated topological superconductivity in a quantum wire. Physical Review Research, 6(2): L022042. doi:10.1103/PhysRevResearch.6.L022042.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000E-0D50-A Version Permalink: https://hdl.handle.net/21.11116/0000-000F-4C06-6
Genre: Journal Article

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PhysRevResearch.6.L022042.pdf (Publisher version), 537KB
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Supplemental Material: contains additional details on the diagonalization of the magnon and electron sub-systems, the derivation of the electron-magnon interaction, the derivation of the effective electron-electron interaction, the derivation of the gap equation, and an extended discussion of the Z2 topological invariant of the superconducting system.
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https://arxiv.org/abs/2312.02655 (Preprint)
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 Creators:
Boström, F. V.1, 2, Author
Viñas Boström, E.3, 4, Author           
Affiliations:
1Institut für Mathematische Physik, Technische Universität Braunschweig, ou_persistent22              
2Division of Solid State Physics and NanoLund, Lund University, ou_persistent22              
3Nano-Bio Spectroscopy Group, Departamento de Física de Materiales, Universidad del País Vasco, ou_persistent22              
4Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              

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 Abstract: Many emergent phases of matter stem from the intertwined dynamics of quasiparticles. Here we show that a topological superconducting phase emerges as the result of interactions between electrons and magnons in a quantum wire and a helical magnet. The magnon-mediated interaction favors triplet superconductivity over a large magnetic phase space region, and stabilizes topological superconductivity over an extended region of chemical potentials. The superconducting gap depends exponentially on the spin-electron coupling, allowing it to be enhanced through material engineering techniques.

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Language(s): eng - English
 Dates: 2024-03-282023-12-052024-05-022024-05-16
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2312.02655
DOI: 10.1103/PhysRevResearch.6.L022042
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Project name : -
Grant ID : 101106809
Funding program : Horizon Europe (HE)
Funding organization : European Commission (EC)
Project name : We acknowledge fruitful discussions with Oladunjoye A. Awoga. F.V.B. acknowledges funding from the Swedish Research Council (VR), and E.V.B. acknowledges funding from the European Union's Horizon Europe research and innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 101106809. Funded by Bibsam.
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Title: Physical Review Research
  Abbreviation : Phys. Rev. Research
Source Genre: Journal
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Publ. Info: College Park, Maryland, United States : American Physical Society (APS)
Pages: - Volume / Issue: 6 (2) Sequence Number: L022042 Start / End Page: - Identifier: ISSN: 2643-1564
CoNE: https://pure.mpg.de/cone/journals/resource/2643-1564