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Disorder-Induced Suppression of Superconductivity in Infinite-Layer Nickelates
Abhishek Ranna1, Romain Grasset2, Martin Gonzalez3,4
1Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany.
None:
The pairing symmetry of superconducting infinite-layer nickelates is a fundamental yet experimentally challenging question. We employ high-energy electron irradiation to induce disorder in superconducting Nd_{0.825}Sr_{0.175}NiO_{2} thin films, examine the impact of pair-breaking defects on superconductivity, and elucidate the nature of the superconducting gap. Our measurements reveal a complete suppression of superconductivity with increasing disorder, suggesting an unconventional, sign-changing order parameter.
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