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Superconducting nitridized-aluminum thin films

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arxiv 2308.06240 v2 pith:XJEA3RPL submitted 2023-08-11 cond-mat.supr-con quant-ph

classification cond-mat.supr-conquant-ph
keywords filmsthinsuperconductingaluminumnitridizednitridized-aluminumnitrogenquantum
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abstract

We report the direct observation of superconductivity in nitridized-aluminum thin films. The films are produced by sputtering deposition of aluminum in a controlled mixture of nitrogen diluted in argon. The concentration of applied nitrogen directly determines the properties of the superconducting thin films. We observe samples displaying critical temperatures up to 3.38$\pm$0.01K and resilience to in-plane magnetic fields well above 1T, with good reproducibility of the results. This work represents an unambiguous demonstration of tunable superconductivity in aluminum-based nitridized thin films. Our results put forward nitridized aluminum as a promising material to be employed in superconducting quantum circuits for quantum technology applications.

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