Microscopic Magnetism of Nickel-Based Infinite-Layer Superconducting Parent Compounds RNiO_(2)(R=La,Nd):A μSR Study  

作　　者：Qiong Wu Ying Fu Le Wang Xuefeng Zhou Shanmin Wang Zihao Zhu Kaiwen Chen Chengyu Jiang Toni Shiroka Adrian D.Hillier Jia-Wei Mei Lei Shu 吴琼;付盈;王乐;周雪峰;王善民;朱子浩;陈锴文;姜程予;Toni Shiroka;Adrian D.Hillier;梅佳伟;殳蕾(State Key Laboratory of Surface Physics,Department of Physics,Fudan University,Shanghai 200438,China;Department of Physics,Southern University of Science and Technology,Shenzhen 518055,China;Shenzhen Institute for Quantum Science and Engineering,and Department of Physics,Southern University of Science and Technology,Shenzhen 518055,China;Laboratory for Muon-Spin Spectroscopy,Paul Scherrer Institute,CH-5232 Villigen PSI,Switzerland;Laboratorium fur Festkorperphysik,ETH Zurich,CH-8093 Zurich,Switzerland;ISIS Facility,STFC Rutherford Appleton Laboratory,Chilton,Didcot,Oxfordshire,OX110QX,United Kingdom;Shanghai Research Center for Quantum Sciences,Shanghai 201315,China)

机构地区：[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 [5]Laboratorium fur Festkorperphysik,ETH Zurich,CH-8093 Zurich,Switzerland [6]ISIS Facility,STFC Rutherford Appleton Laboratory,Chilton,Didcot,Oxfordshire,OX110QX,United Kingdom [7]Shanghai Research Center for Quantum Sciences,Shanghai 201315,China

出　　处：《Chinese Physics Letters》2024年第9期133-139,共7页中国物理快报（英文版）

基　　金：supported by the National Key Research and Development Program of China(Grant No.2022YFA1402203);the National Natural Science Foundation of China(Grant No.12174065);supported by the Shenzhen Fundamental Research Program(Grant Nos.JCYJ20220818100405013 and JCYJ20230807093204010)。

摘　　要：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 RNiO_(2)(R=La,Nd).In either compound,the zero-fieldμSR spectra down to the lowest measured temperature reveal no long-range magnetic order.In LaNiO_(2),short-range spin correlations appear below T=150 K,and spins fully freeze below T∼10 K.NdNiO_(2)exhibits a more complex spin dynamics driven by the Nd 4f and Ni3d electron spin fluctuations.Further,it shows features suggesting the proximity to a spin-glass state occurring below T=5 K.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.

关 键 词：order nickel RELAXATION 

分 类 号：O469[理学—凝聚态物理]