Quantum oscillations in the heat capacity of Kondo insulator YbB12
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arXiv
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| Autores principales: | , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| author | Chen, Kuan-Wen Zhu, Yuan Ratkovski, Danilo Zheng, Guoxin Zhang, Dechen Chan, Aaron Jenkins, Kaila Blawat, Joanna Asaba, Tomoya Iga, Fumitoshi Varma, C. Matsuda, Yuji Singleton, John Bangura, Ali F. Li, Lu |
| author_facet | Chen, Kuan-Wen Zhu, Yuan Ratkovski, Danilo Zheng, Guoxin Zhang, Dechen Chan, Aaron Jenkins, Kaila Blawat, Joanna Asaba, Tomoya Iga, Fumitoshi Varma, C. Matsuda, Yuji Singleton, John Bangura, Ali F. Li, Lu |
| contents | We observe the magnetic quantum oscillation in the heat capacity of the Kondo insulator YbB$_{12}$. The frequency of these oscillations $F = 670$ T, aligns with findings from magnetoresistance and torque magnetometry experiments for $μ_0 H > 35$ T in the Kondo insulating phase. Remarkably, the quantum oscillation amplitudes in the heat capacity are substantial, with $Δ\tilde{C}/T \approx$ 0.5 $\rm{mJ}$ $\rm{mol^{-1}K^{-2}}$ at 0.8 K, accounting for 13$\%$ of the known linear heat capacity coefficient $γ$. Double-peak structures of quantum-oscillation amplitudes due to the distribution function of fermions were identified and used to determine the value of the effective mass from the heat capacity, which agrees well with that from torque magnetometry. These observations support charge-neutral fermions contributing to the quantum oscillations in YbB$_{12}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_07471 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum oscillations in the heat capacity of Kondo insulator YbB12 Chen, Kuan-Wen Zhu, Yuan Ratkovski, Danilo Zheng, Guoxin Zhang, Dechen Chan, Aaron Jenkins, Kaila Blawat, Joanna Asaba, Tomoya Iga, Fumitoshi Varma, C. Matsuda, Yuji Singleton, John Bangura, Ali F. Li, Lu Strongly Correlated Electrons We observe the magnetic quantum oscillation in the heat capacity of the Kondo insulator YbB$_{12}$. The frequency of these oscillations $F = 670$ T, aligns with findings from magnetoresistance and torque magnetometry experiments for $μ_0 H > 35$ T in the Kondo insulating phase. Remarkably, the quantum oscillation amplitudes in the heat capacity are substantial, with $Δ\tilde{C}/T \approx$ 0.5 $\rm{mJ}$ $\rm{mol^{-1}K^{-2}}$ at 0.8 K, accounting for 13$\%$ of the known linear heat capacity coefficient $γ$. Double-peak structures of quantum-oscillation amplitudes due to the distribution function of fermions were identified and used to determine the value of the effective mass from the heat capacity, which agrees well with that from torque magnetometry. These observations support charge-neutral fermions contributing to the quantum oscillations in YbB$_{12}$. |
| title | Quantum oscillations in the heat capacity of Kondo insulator YbB12 |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2501.07471 |