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arXiv · 0912.4539

Superconductivity Induced in Iron Telluride Films by Low Temperature Oxygen Incorporation

Yuefeng Nie·Donald Telesca·Joseph I. Budnick·Boris Sinkovic·Barrett O. Wells
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Abstract

We report superconductivity induced in films of the non-superconducting, antiferromagnetic parent material FeTe by low temperature oxygen incorporation in a reversible manner. X-ray absorption shows that oxygen doping changes the nominal Fe valence state from 2+ in the non-superconducting state to mainly 3+ in the superconducting state. Thus superconductivity in O doped FeTe occurs in a quite different charge and strain state than the more common FeTe$_{1-x}$Se$_x$. This work also suggests a convenient path for conducting doping experiments in-situ with many measurement techniques.

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Yuefeng Nie, Donald Telesca, Joseph I. Budnick, Boris Sinkovic, Barrett O. Wells. 2009-12-22. Superconductivity Induced in Iron Telluride Films by Low Temperature Oxygen Incorporation. https://doi.org/10.1103/physrevb.82.020508

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