Observation of magnetic adatom-induced Majorana vortex and its fusion with field-induced Majorana vortex in an iron-based superconductor

ORAL

Abstract

Iron-based superconductors with nontrivial band topology have recently emerged as a surprisingly promising platform for creating distinct Majorana zero modes in magnetic vortices in a single material and at relatively high temperatures. Here we report the observation of the proposed quantum anomalous vortex with integer quantized vortex core states and Majorana zero mode induced by magnetic Fe adatoms deposited on the surface and the realization of its fusion with a nearby field-induced Majorana vortex in iron-based superconductor FeTe0.55Se0.45. We also observe vortex-free Yu-Shiba-Rusinov bound states at the Fe adatoms with a weaker coupling to the substrate, and discover a reversible transition between Yu-Shiba-Rusinov states and Majorana zero mode by manipulating the exchange coupling strength. The dual origin of the Majorana zero modes, from magnetic adatoms and external magnetic field, provides a new single-material platform for studying their interactions and braiding in superconductors bearing topological band structures.

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Presenters

  • Peng Fan

    • Chinese Academy of Sciences,Institute of Physics

Authors

  • Peng Fan

    • Chinese Academy of Sciences,Institute of Physics

  • Fazhi Yang

    • Chinese Academy of Sciences,Institute of Physics
    • Institute of Physics, Chinese Academy of Sciences

  • Guojian Qian

    • Chinese Academy of Sciences,Institute of Physics

  • Hui Chen

    • Chinese Academy of Sciences,Institute of Physics
    • Institute of Physics, Chinese Academy of Sciences
    • Chinese Academy of Sciences, Institute of Physics

  • Yu-Yang Zhang

    • Chinese Academy of Sciences,Institute of Physics
    • University of Chinese Academy of Sciences
    • Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
    • School of physical sciences, Institute of Physics and University of Chinese Academy of Sciences
    • Institute of Physics, Chinese Academy of Sciences
    • Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences

  • Geng Li

    • Chinese Academy of Sciences,Institute of Physics
    • Chinese Academy of Sciences, Institute of Physics
    • Institute of Physics, Chinese Academy of Sciences

  • Zihao Huang

    • Chinese Academy of Sciences,Institute of Physics

  • Yuqing Xing

    • Chinese Academy of Sciences,Institute of Physics
    • Institute of Physics, Chinese Academy of Sciences
    • Chinese Academy of Sciences, Institute of Physics

  • Lingyuan Kong

    • Chinese Academy of Sciences,Institute of Physics
    • Institute of Physics, Chinese Academy of Sciences

  • Wenyao Liu

    • Chinese Academy of Sciences,Institute of Physics
    • Institute of Physics, Chinese Academy of Sciences

  • Kun Jiang

    • Boston University
    • Boston College

  • Chengmin Shen

    • Chinese Academy of Sciences,Institute of Physics
    • Institute of Physics, Chinese Academy of Sciences

  • Shixuan Du

    • Chinese Academy of Sciences,Institute of Physics
    • Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
    • School of physical sciences, Institute of Physics and University of Chinese Academy of Sciences
    • Institute of Physics, Chinese Academy of Sciences
    • Chinese Academy of Science
    • Chinese Academy of Sciences, Institute of Physics
    • Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences

  • John Schneeloch

    • Brookhaven National Laboratory
    • Condensed Matter Physics and Materials Science Department

  • Ruidan Zhong

    • Princeton University
    • Brookhaven National Labs
    • Condensed Matter Physics and Materials Science Department
    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory
    • Brookhaven National Laboratory

  • Genda Gu

    • Brookhaven National Laboratory
    • Brookhaven National Laboratories
    • Brookhaven national lab
    • Brookhaven National Labs
    • Condensed Matter Physics and Materials Science Department
    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory
    • CMPMS, Brookhaven National Laboratory
    • Brookhaven National Lab
    • COndensed Matter Physics and Materials Science Department, Brookhaven National Laboratory

  • Ziqiang Wang

    • Boston University
    • Physics, Boston College
    • Boston College
    • Department of Physics, Boston College

  • Hong Ding

    • Chinese Academy of Sciences,Institute of Physics
    • Institute of Physics, Chinese Academy of Sciences
    • Chinese Academy of Sciences

  • Hongjun Gao

    • Chinese Academy of Sciences,Institute of Physics
    • Institute of Physics, Chinese Academy of Sciences
    • Chinese Academy of Sciences, Institute of Physics