IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v12y2021i1d10.1038_s41467-020-20529-x.html
   My bibliography  Save this article

Spatially dispersing Yu-Shiba-Rusinov states in the unconventional superconductor FeTe0.55Se0.45

Author

Listed:
  • Damianos Chatzopoulos

    (Leiden University)

  • Doohee Cho

    (Leiden University
    Yonsei University)

  • Koen M. Bastiaans

    (Leiden University)

  • Gorm O. Steffensen

    (University of Copenhagen)

  • Damian Bouwmeester

    (Leiden University
    Delft University of Technology)

  • Alireza Akbari

    (Max Planck Institute for the Chemical Physics of Solids
    POSTECH)

  • Genda Gu

    (Brookhaven National Laboratory)

  • Jens Paaske

    (University of Copenhagen)

  • Brian M. Andersen

    (University of Copenhagen)

  • Milan P. Allan

    (Leiden University)

Abstract

By using scanning tunneling microscopy (STM) we find and characterize dispersive, energy-symmetric in-gap states in the iron-based superconductor FeTe0.55Se0.45, a material that exhibits signatures of topological superconductivity, and Majorana bound states at vortex cores or at impurity locations. We use a superconducting STM tip for enhanced energy resolution, which enables us to show that impurity states can be tuned through the Fermi level with varying tip-sample distance. We find that the impurity state is of the Yu-Shiba-Rusinov (YSR) type, and argue that the energy shift is caused by the low superfluid density in FeTe0.55Se0.45, which allows the electric field of the tip to slightly penetrate the sample. We model the newly introduced tip-gating scenario within the single-impurity Anderson model and find good agreement to the experimental data.

Suggested Citation

  • Damianos Chatzopoulos & Doohee Cho & Koen M. Bastiaans & Gorm O. Steffensen & Damian Bouwmeester & Alireza Akbari & Genda Gu & Jens Paaske & Brian M. Andersen & Milan P. Allan, 2021. "Spatially dispersing Yu-Shiba-Rusinov states in the unconventional superconductor FeTe0.55Se0.45," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-020-20529-x
    DOI: 10.1038/s41467-020-20529-x
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/s41467-020-20529-x
    File Function: Abstract
    Download Restriction: no
    File URL: https://libkey.io/10.1038/s41467-020-20529-x?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Sujoy Karan & Haonan Huang & Alexander Ivanovic & Ciprian Padurariu & Björn Kubala & Klaus Kern & Joachim Ankerhold & Christian R. Ast, 2024. "Tracking a spin-polarized superconducting bound state across a quantum phase transition," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    2. Jian-Feng Ge & Koen M. Bastiaans & Damianos Chatzopoulos & Doohee Cho & Willem O. Tromp & Tjerk Benschop & Jiasen Niu & Genda Gu & Milan P. Allan, 2023. "Single-electron charge transfer into putative Majorana and trivial modes in individual vortices," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-020-20529-x. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.nature.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.