Ultrasonic investigation of the Kondo semimetal CeBi
| Autor: | Pan, Yupeng, He, Xiaobo, Zou, Shuo, Zeng, Hai, Zhao, Yuqian, Li, Ziyu, Li, Yuesheng, Luo, Yongkang |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 108, 165153 (2023) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.108.165153 |
| Popis: | We report the elastic properties of the Kondo semimetal CeBi by resonant ultrasound spectroscopy measurements at zero magnetic field. Clear elastic softening is found in bulk modulus $C_B$ below $\sim 60$ K. Such a softening in $C_B$, in addition to the anomalous temperature dependent Poisson's ratio, is hardly attributable to multipolar response for stable localized $4f$ orbital, but can be well described by a two-band model arising from the hybridization between conduction- and $4f$- electrons. These results probably are consequences of the valence fluctuations in this Kondo semimetal as originally suggested by a Fermi-surface expansion observed in a previous angle-resolved photoemission spectroscopy study [P. Li \textit{et al.}, Phys. Rev. B $\mathbf{100}$, 155110 (2019)]. Comment: 7+4 pages, 5+2 figures, 2+1 tables |
| Databáze: | arXiv |
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