Scientific Papers

Phys. Rev. B 108, 165153 (2023)

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 CB below 60 K. Such a softening in CB, in addition to the anomalous temperature dependent Poisson’s ratio, is hardly attributable to multipolar response for a 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 et al., Phys. Rev. B 100, 155110 (2019)].

  • Received 20 June 2023
  • Revised 27 September 2023
  • Accepted 17 October 2023


©2023 American Physical Society

Condensed Matter, Materials & Applied Physics

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