Bulk superconductivity in FeTe1−xSex via physicochemical pumping of excess iron

ORAL

Abstract

The iron-based superconductor FeTe1-xSex has attracted considerable attention as a candidate
topological superconductor owing to a unique combination of topological surface states and bulk
high-temperature superconductivity. The superconducting properties of as-grown single crystals,
however, are highly variable and synthesis dependent due to excess interstitial iron impurities incor-
porated during growth. Here we report a novel physicochemical process for pumping this interstitial
iron out of the FeTe1-xSex matrix and achieving bulk superconductivity. Our method should have
signicant value for the synthesis of high-quality single crystals of FeTe1-xSex with large supercon-
ducting volume fractions.

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Presenters

  • Lianyang Dong

    • Florida State University
    • University of California, Santa Barbara

Authors

  • Lianyang Dong

    • Florida State University
    • University of California, Santa Barbara

  • He Zhao

    • Boston college

  • Ilija Zeljkovic

    • Boston College
    • Boston college

  • Stephen Wilson

    • University of California, Santa Barbara
    • Materials Department, University of California, Santa Barbara
    • Materials Engineering, University of California, Santa Barbara
    • California NanoSystems Institute/Materials, University of California, Santa Barbara

  • John W Harter

    • University of California, Santa Barbara