Magnetic, superconducting, and topological surface states on Fe<sub>1+y</sub>Te<sub>1−x</sub>Se<sub>x</sub>

ORAL

Abstract

The idea of employing non-Abelian statistics for error-free quantum computing ignited interest in recent reports of topological surface superconductivity and Majorana zero modes. Here, we combine neutron scattering, angle-resolved photoemission spectroscopy, and microprobe composition and resistivity measurements to characterize the electronic state of Fe1+yTe1−xSex. We establish a phase diagram in which the superconductivity is observed only at sufficiently low Fe concentration, in association with distinct antiferromagnetic correlations, while the coexisting topological surface state occurs only at sufficiently high Te concentration.

*Work at Brookhaven is supported by the Office of Basic Energy Sciences, Materials Sciences and Engineering Division, U.S. Department of Energy (DOE) under Contract No. DE-SC0012704.

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Presenters

  • Yangmu Li

    • Brookhaven National Laboratory
    • Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory

Authors

  • Yangmu Li

    • Brookhaven National Laboratory
    • Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory

  • Nader Zaki

    • Brookhaven National Laboratory

  • David Michael Fobes

    • Los Alamos National Laboratory
    • Los Alamos National Lab

  • Zhijun Xu

    • National Institute of Standards and Technology
    • NIST and University of Maryland
    • NIST Center for Neutron research, National Institute of Standards and Technology
    • NIST Center for Neutron Research
    • University of Maryland
    • NIST Center for Neutron Research, NIST

  • 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

  • Rongwei Hu

    • Brookhaven National Laboratory

  • Cedomir Petrovic

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

  • Andrei Savici

    • Oak Ridge National Laboratory
    • Oak Ridge National Lab

  • Vasile Garlea

    • Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN
    • Oak Ridge National Lab
    • Neutron Scattering Division, Oak Ridge National Laboratory

  • Peter David Johnson

    • Brookhaven National Laboratory

  • John Tranquada

    • Brookhaven National Laboratory
    • Brookhaven national lab
    • Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory

  • Igor Zaliznyak

    • Brookhaven National Laboratory
    • Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory