Spin-glass state in nickelate superconductors

IF 6.2 1区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

npj Quantum Materials Pub Date : 2025-08-28 DOI:10.1038/s41535-025-00813-z

David R. Saykin, Martin Gonzalez, Jennifer Fowlie, Steven A. Kivelson, Harold Y. Hwang, Aharon Kapitulnik

引用次数: 0

Abstract

Magneto-optical measurements in La_0.8Sr_0.2NiO₂ and Nd_0.825Sr_0.175NiO₂ reveal an intriguing new facet of infinite-layer nickelate superconductors: the onset of spin-glass behavior at a temperature far exceeding the superconducting critical temperature T_c. This discovery sharply contrasts with copper oxide superconductors, where magnetism and superconductivity remain largely exclusive. Moreover, the magnitude and onset temperature of the polar Kerr effect in Nd_0.825Sr_0.175NiO₂ fabricated on SrTiO₃ and (LaAlO₃)_0.3(Sr₂TaAlO₆)_0.7 substrates differ dramatically, while T_c does not.

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镍酸盐超导体中的自旋玻璃态

在La0.8Sr0.2NiO2和Nd0.825Sr0.175NiO2中的磁光测量揭示了无限层镍酸盐超导体的一个有趣的新方面：在远超过超导临界温度Tc的温度下开始自旋玻璃行为。这一发现与氧化铜超导体形成了鲜明对比，在氧化铜超导体中，磁性和超导性在很大程度上仍然是排他性的。此外，在SrTiO3和（LaAlO3）0.3(Sr2TaAlO6)0.7基体上制备的Nd0.825Sr0.175NiO2的极性Kerr效应的大小和开始温度有显著差异，而Tc则没有。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

npj Quantum Materials Materials Science-Electronic, Optical and Magnetic Materials

CiteScore

10.60

自引率

3.50%

发文量

107

审稿时长

6 weeks

期刊介绍： npj Quantum Materials is an open access journal that publishes works that significantly advance the understanding of quantum materials, including their fundamental properties, fabrication and applications.