Uniform Oxygen Doping Leads to Superconductivity in FeTe FilmsReport as inadecuate



 Uniform Oxygen Doping Leads to Superconductivity in FeTe Films


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FeTe is known to become a superconductor when doped with oxygen. Using layer by layer growth of single crystal films by molecular beam epitaxy MBE, we have studied how oxygen incorporates. If oxygen is supplied during growth of a layer, it substitutes for tellurium inhomogeneously in oxygen domains that are not associated with superconductivity. When oxygen is supplied after growth, it diffuses homogeneously into the crystalline film and incorporates interstitially. Only the interstitial oxygen causes superconductivity to emerge. This suggests that the superconductivity observed in this material is spatially uniform and not filamentary.



Author: Mao Zheng; Hefei Hu; Can Zhang; Brian Mulcahy; Jianmin Zuo; James Eckstein

Source: https://archive.org/







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