Itinerant to relocalized transition of felectrons in the Kondo insulator CeRu_(4)Sn_(6)  

作　　者：Fan-Ying Wu Qi-Yi Wu Chen Zhang Yang Luo Xiangqi Liu Yuan-Feng Xu Dong-Hui Lu Makoto Hashimoto Hao Liu Yin-Zou Zhao Jiao-Jiao Song Ya-Hua Yuan Hai-Yun Liu Jun He Yu-Xia Duan Yan-Feng Guo Jian-Qiao Meng 

机构地区：[1]School of Physics and Electronics,Central South University,Changsha 410083,China [2]School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China [3]Center for Correlated Matter and School of Physics,Zhejiang University,Hangzhou 310058,China [4]Stanford Synchrotron Radiation Lightsource,SLAC National Accelerator Laboratory,Menlo Park,CA 94025,USA [5]Beijing Academy of Quantum Information Sciences,Beijing 100085,China [6]ShanghaiTech Laboratory for Topological Physics,ShanghaiTech University,Shanghai 201210,China

出　　处：《Frontiers of physics》2023年第5期153-160,共8页物理学前沿（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12074436 and 11574402);the Science and Technology Innovation Program of Hunan Province(No.2022RC3068);the open project of Beijing National Laboratory for Condensed Matter Physics(Grant No.ZBJ2106110017).

摘　　要：The three-dimensional electronic structure and the nature of Ce 4f electrons of the Kondo insulator CeRu_(4)Sn_(6)are investigated by angle-resolved photoemission spectroscopy,utilizing tunable photon energies.Our results reveal(i)the three-dimensional k-space nature of the Fermi surface,(ii)the localized-to-itinerant transition of f electrons occurs at a much high temperature than the hybridization gap opening temperature,and(iii)the“relocalization”of itinerant f-electrons below 25 K,which could be the precursor to the establishment of magnetic order.

关 键 词：Kondo insulator heavy fermion ARPES electronic structure relocalization 

分 类 号：O469[理学—凝聚态物理]