Stability of superconducting Nd_(0.8)Sr_(0.2)NiO_(2) thin films

作     者：Xiang Ding Shengchun Shen Huaqian Leng Minghui Xu Yan Zhao Junrui Zhao Xuelei Sui Xiaoqiang Wu Haiyan Xiao Xiaotao Zu Bing Huang Huiqian Luo Pu Yu Liang Qiao Xiang Ding;Shengchun Shen;Huaqian Leng;Minghui Xu;Yan Zhao;Junrui Zhao;Xuelei Sui;Xiaoqiang Wu;Haiyan Xiao;Xiaotao Zu;Bing Huang;Huiqian Luo;Pu Yu;Liang Qiao

作者机构：School of PhysicsUniversity of Electronic Science and Technology of ChinaChengdu 610054China Department of PhysicsTsinghua UniversityBeijing 100084China Beijing Computational Science Research CenterBeijing 100193China School of Mechanical EngineeringChengdu UniversityChengdu 610106China Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China Songshan Lake Materials LaboratoryDongguan 523808China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2022年第65卷第6期

页      面：123-130页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：This work was supported by the National Natural Science Foundation of China(Grant Nos.11774044 52072059 and 11822411). 

主　　题：nickelate superconductor stability ionic liquid gating 

摘      要：The discovery of superconducting states in the nickelate thin film with infinite-layer structure has paved a new way for studying unconventional superconductivity.So far,research in this field is still very limited due to difficulties in sample preparation.Here we report the successful preparation of the superconducting state of Nd_(0.8)Sr_(0.2)NiO_(2)thin film(T_(c)=8.0-11.1 K)and study the stability of such films in the ambient environment,water,and under electrochemical conditions.Our work demonstrates that the superconducting state of Nd_(0.8)Sr_(0.2)NiO_(2)is remarkably stable,which can last for at least 47-day continuous exposure to air at 20°C and 35%relative humidity.We also show that the superconductivity disappears after being immersed in de-ionized water at room temperature for 5 h.Surprisingly,it can also survive under ionic liquid gating conditions with an applied voltage of about 4 V,which is even more stable than conventional perovskite complex oxides.