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Itinerant to relocalized transition of f electrons in the Kondo insulator CeRu4Sn6

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arxiv 2305.00376 v1 pith:4CWIQ4QZ submitted 2023-04-30 cond-mat.str-el

Fan-Ying Wu , Qi-Yi Wu , Chen Zhang , Yang Luo , Xiangqi Liu , Yuan-Feng Xu , Dong-Hui Lu , Makoto Hashimoto
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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
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classification cond-mat.str-el
keywords electronsceru4sn6insulatoritinerantkondonaturetemperaturethree-dimensional
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The three-dimensional electronic structure and the nature of Ce 4f electrons of the Kondo insulator CeRu4Sn6 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.

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