Microscopic Magnetism of Nickel-Based Infinite-Layer Superconducting Parent Compounds RNiO2(R=La,Nd):A μSR Study

吴琼 ¹付盈 ²王乐 ³周雪峰 ²王善民 ²朱子浩 ¹陈锴文 ¹姜程予 ¹Toni Shiroka ⁴Adrian D.Hillier ⁵梅佳伟 ²殳蕾⁶

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作者信息

1. State Key Laboratory of Surface Physics,Department of Physics,Fudan University,Shanghai 200438,China
2. Department of Physics,Southern University of Science and Technology,Shenzhen 518055,China
3. Shenzhen Institute for Quantum Science and Engineering,and Department of Physics,Southern University of Science and Technology,Shenzhen 518055,China
4. Laboratory for Muon-Spin Spectroscopy,Paul Scherrer Institute,CH-5232 Villigen PSI,Switzerland;Laboratorium für Festkörperphysik,ETH Zürich,CH-8093 Zürich,Switzerland
5. ISIS Facility,STFC Rutherford Appleton Laboratory,Chilton,Didcot,Oxfordshire,OX11 0QX,United Kingdom
6. State Key Laboratory of Surface Physics,Department of Physics,Fudan University,Shanghai 200438,China;Shanghai Research Center for Quantum Sciences,Shanghai 201315,China
折叠

Abstract

By using muon spin relaxation(μSR)measurements,we perform a comparative study of the microscopic magnetism in the parent compounds of infinite-layer nickelate superconductors RNiO2(R=La,Nd).In either compound,the zero-field μSR spectra down to the lowest measured temperature reveal no long-range magnetic order.In LaNiO2,short-range spin correlations appear below T=150 K,and spins fully freeze below T～10 K.NdNiO2 exhibits a more complex spin dynamics driven by the Nd 4f and Ni 3d electron spin fluctuations.Further,it shows features suggesting the proximity to a spin-glass state occurring below T=5K.In both compounds,the spin behavior with temperature is further confirmed by longitudinal-field μSR measurements.These results provide new insight into the magnetism of the parent compounds of the superconducting nickelates,crucial to understanding the microscopic origin of their superconductivity.

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基金项目

National Key Research and Development Program of China(2022YFA1402203)

National Natural Science Foundation of China(12174065)

Shenzhen Fundamental Research Program(JCYJ20220818100405013)

Shenzhen Fundamental Research Program(JCYJ20230807093204010)

staff of the ISIS(RB 2010302)

PSI()

出版年

2024

中国物理快报(英文版)

中国科学院物理研究所,中国物理学会

中国物理快报(英文版)

CSTPCDCSCDEI

影响因子：0.515

ISSN：0256-307X

参考文献量78

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