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- W2896844501 abstract "Abstract Among several Fe-based systems recently found to be superconducting are phases within the Fe1+dSe (FS) and Fe1+dSe1-xTex (FST) families, along with their intercalant-variants. A few groups have recently reported that isostructural Fe1+dTe (FT), although generally reported to be non-superconducting, exhibits trace superconductivity near 10 K upon exposure to oxygen. On the other hand, exposure to oxygen degrades superconductivity in FS, yet improves it in FST for high Te content as well as for high Fe content. We performed a comprehensive study to investigate the effects of oxygen exposure in bulk single crystals of Fe1±dTe using photoelectron spectroscopy, x-ray diffraction, electron diffraction, and Magnetic Field Modulated Microwave Spectroscopy. We report a change in the oxidation state from Te0 to Te4+ and Fe0 to Fe2+/3+ in agreement with others. However, this does not lead to superconductivity. In addition, oxygenation leads to the evolution of trace quantities of an iron-deficient minority phase consistent with an oriented crystalline intergrowth of FeTe2 within the Fe1+dTe crystal lattice." @default.
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- W2896844501 date "2019-12-01" @default.
- W2896844501 modified "2023-10-14" @default.
- W2896844501 title "Effects of oxygen annealing on single crystal iron telluride" @default.
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- W2896844501 doi "https://doi.org/10.1016/j.physc.2018.10.005" @default.
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