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arXiv · 2305.00376

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

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
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Abstract

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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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. 2023-04-30. Itinerant to relocalized transition of f electrons in the Kondo insulator CeRu4Sn6. https://doi.org/10.1007/s11467-023-1298-y

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