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  Coherent coupling between vortex bound states and magnetic impurities in 2D layered superconductors

Park, S., Barrena, V., Mañas-Valero, S., Baldovi, J., Fente, A., Herrera, E., et al. (2021). Coherent coupling between vortex bound states and magnetic impurities in 2D layered superconductors. Nature Communications, 12(1): 4668. doi:10.1038/s41467-021-24531-9.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0008-F7CC-C Version Permalink: https://hdl.handle.net/21.11116/0000-000B-EEF7-3
Genre: Journal Article

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 Creators:
Park, S.1, Author
Barrena, V.2, Author
Mañas-Valero, S.3, Author
Baldovi, J.3, 4, Author           
Fente, A.2, Author
Herrera, E.2, Author
Mompeán, F.5, Author
García-Hernández, M.5, Author
Rubio, A.4, 6, Author           
Coronado, E.3, Author
Guillamón, I.2, Author
Yeyati, A. L.1, Author
Suderow, H.2, Author
Affiliations:
1Departamento de Física Teórica de la Materia Condensada, Instituto Nicolás Cabrera and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, ou_persistent22              
2Laboratorio de Bajas Temperaturas y Altos Campos Magnéticos, Departamento de Física de la Materia Condensada, Instituto Nicolás Cabrera and Condensed Matter Physics Center (IFIMAC), Unidad Asociada UAM-CSIC, Universidad Autónoma de Madrid, ou_persistent22              
3Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, ou_persistent22              
4Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
5Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC), ou_persistent22              
6Nano-Bio Spectroscopy Group and European Theoretical Spectroscopy Facility (ETSF), Universidad del País Vasco CFM CSIC-UPV/EHU-MPC & DIPC, ou_persistent22              

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 Abstract: Bound states in superconductors are expected to exhibit a spatially resolved electron-hole asymmetry which is the hallmark of their quantum nature. This asymmetry manifests as oscillations at the Fermi wavelength, which is usually tiny and thus washed out by thermal broadening or by scattering at defects. Here we demonstrate theoretically and confirm experimentally that, when coupled to magnetic impurities, bound states in a vortex core exhibit an emergent axial electron-hole asymmetry on a much longer scale, set by the coherence length. We study vortices in 2H-NbSe2 and in 2H-NbSe1.8S0.2 with magnetic impurities, characterizing these with detailed Hubbard-corrected density functional calculations. We find that the induced electron-hole imbalance depends on the band character of the superconducting material. Our results show that coupling between quantum bound states in superconductors is remarkably robust and has a strong influence in tunneling measurements.

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Language(s): eng - English
 Dates: 2021-03-142021-06-232021-08-03
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1038/s41467-021-24531-9
arXiv: 2103.04164
 Degree: -

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Project name : -
Grant ID : 751047
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)
Project name : This work was supported by the EU (ERC-StG-679080, ERC-2015-AdG-694097, ERC AdG Mol-2D 788222 and H2020-MSCAIF-2016-751047), by FET-OPEN program (grant 862893 FATMOLS), by EU program Cost (NANOCOHYBRI CA16218 and MOLSPIN CA15128), by Graphene Flagship (grant agreement number 881603, GrapheneCore3 project), by the Spanish State Research Agency (FIS2017-84330-R, RYC-2014-15093, MDM-2014-0377, MDM-2015-0538, CEX2018-000805-M, MAT2017-89993-R co-financed by FEDER and CEX2019-000919-M), by the Deutsche Forschungsgemeinschaft (DFG) under under Germany’s Excellence Strategy— Cluster of Excellence Advanced Imaging of Matter (AIM) EXC 2056—390715994, RTG 1995 and GRK 2247, by the Comunidad de Madrid through program NANOMAGCOST-CM (Program No.S2018/NMT-4321) and by the Generalitat Valenciana (Grupos Consolidados IT1249-19, Prometeo Programme, iDiFEDER/2018/061 and CDEIGENT/2019/022). J.J.B. acknowledges the Marie Curie Fellowship program (H2020-MSCA-IF-2016-751047). A.R. acknowledges support by the MPI-New York City Center for Non-Equilibrium Quantum Phenomena. H.S., E.H., and I.G. acknowledge SEGAINVEX at UAM for design and construction of STM cryogenic equipment. S.P. acknowledges Banco Santander - María de Maeztu program (ref. 102I0112).
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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 12 (1) Sequence Number: 4668 Start / End Page: - Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723