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.
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
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Lianyang Dong
Florida State University, University of California, Santa Barbara
Authors
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Lianyang Dong
Florida State University, University of California, Santa Barbara
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He Zhao
Boston college
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Ilija Zeljkovic
Boston College, Boston college
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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
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John W Harter
University of California, Santa Barbara