Direct observation of heavy quasiparticles in the Kondo-lattice compound CeIn3

作     者：Yun Zhang Wei Feng Xia Lou Tianlun Yu Xiegang Zhu Shiyong Tan Bingkai Yuan Yi Liu Haiyan Lu Donghua Xie Qin Liu Wen Zhang Xuebing Luo Yaobo Huang Lizhu Luo Zhengjun Zhang Xinchun Lai Qiuyun Chen 

作者机构：Science and Technology on Surface Physics and Chemistry Laboratory Mianyang 621907 China Department of Engineering Physics Tsinghua University Beijing 100084 China State Key Laboratory of Surface Physics and Department of Physics Fudan University Shanghai 200433 China Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201204 China Key Laboratory of Advanced Materials School of Materials Science and Engineering Tsinghua University Beijing 100084 China 

出 版 物：《Physical Review B》 (Phys. Rev. B)

年 卷 期：2018年第97卷第4期

页      面：045128-045128页

核心收录：

基　　金：National Natural Science Foundation of China, NSFC, (11504342, 11774320, U1630248) National Natural Science Foundation of China, NSFC China Academy of Engineering Physics, CAEP, (201501040) China Academy of Engineering Physics, CAEP National Basic Research Program of China (973 Program), (2016YFA0300200, 2017YFA0303104) National Basic Research Program of China (973 Program) Science Challenge Project, (TZ2016004) Science Challenge Project 

主　　题：Electronic structure Magnetism Angle-resolved photoemission spectroscopy 

摘      要：The electronic structure of the Kondo lattice CeIn3 has been studied by on-resonant angle-resolved photoemission spectroscopy and scanning tunneling microscopy/spectroscopy. A weakly dispersive quasiparticle band has been observed directly with an energy dispersion of 4 meV by photoemission, implying the existence of weak hybridization between the f electrons and conduction electrons. The hybridization is further confirmed by the formation of the hybridization gap revealed by temperature-dependent scanning tunneling spectroscopy. Moreover, we find the hybridization strength in CeIn3 is much weaker than that in the more two-dimensional compounds CeCoIn5 and CeIrIn5. Our results may be essential for the complete microscopic understanding of this important compound and the related heavy-fermion systems.