Disorder-Induced Suppression of Superconductivity in Infinite-Layer Nickelates.

Authors

Abhishek Ranna, Romain Grasset, Martin Gonzalez, Kyuho Lee, Bai Yang Wang, Edgar Abarca Morales, Florian Theuss, Zuzanna H Filipiak, Michal Moravec, Marcin Konczykowski, Harold Y Hwang, Andrew P Mackenzie, Berit H Goodge

Published in

Physical review letters. Volume 135. Issue 12. Pages 126501. Sep 19, 2025.

Abstract

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.

PMID:
41046393
Bibliographic data and abstract were imported from PubMed on 06 Oct 2025.

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