Kondo scattering in underdoped Nd1−xSrxNiO_(2)infinite-layer superconducting thin films  

作　　者：Ting-Na Shao Zi-Tao Zhang Yu-Jie Qiao Qiang Zhao Hai-Wen Liu Xin-Xiang Chen Wei-Min Jiang Chun-Li Yao Xing-Yu Chen Mei-Hui Chen Rui-Fen Dou Chang-Min Xiong Guang-Ming Zhang Yi-Feng Yang Jia-Cai Nie 

机构地区：[1]Department of Physics,Beijing Normal University,Beijing 100875,China [2]State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics,Tsinghua University,Beijing 100084,China [3]Frontier Science Center for Quantum Information,Beijing 100084,China [4]Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [5]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China [6]Songshan Lake Materials Laboratory,Dongguan 523808,China

出　　处：《National Science Review》2023年第11期91-97,共7页国家科学评论（英文版）

基　　金：supported by the National Natural Science Foundation of China(92065110,11974048,12074334,12174429,and 12022407);the National Basic Research Program of China(2014CB920903 and 2013CB921701);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB33010100).

摘　　要：The recent discovery of superconductivity in infinite-layer nickelates generates tremendous research endeavors,but the ground state of their parent compounds is still under debate.Here,we report experimental evidence for the dominant role of Kondo scattering in the underdoped Nd1−xSrxNiO_(2) thin films.A resistivity minimum associated with logarithmic temperature dependence in both longitudinal and Hall resistivities are observed in the underdoped Nd1−xSrxNiO_(2) samples before the superconducting transition.At lower temperatures down to 0.04 K,the resistivities become saturated,following the prediction of the Kondo model.A linear scaling behaviorσAHE x y∼σx x between anomalous Hall conductivityσAHE x y and conductivityσx x is revealed,verifying the dominant Kondo scattering at low temperature.The effect of weak(anti-)localization is found to be secondary.Our experiments can help in clarifying the basic physics in the underdoped Nd1−xSrxNiO_(2) infinite-layer thin films.

关 键 词：Kondo scattering SUPERCONDUCTIVITY underdoped infinite-layer nickelate thin film 

分 类 号：TB383.2[一般工业技术—材料科学与工程] O511.3[理学—低温物理]