Heat conduction in magnetic insulators via hybridization of acoustic phonons and spin-flip excitations
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866913808894656512 |
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| author | Pocs, Christopher A. Leahy, Ian A. Xing, Jie Choi, Eun Sang Sefat, Athena S. Hermele, Michael Lee, Minhyea |
| author_facet | Pocs, Christopher A. Leahy, Ian A. Xing, Jie Choi, Eun Sang Sefat, Athena S. Hermele, Michael Lee, Minhyea |
| contents | We present a comprehensive study on the longitudinal magneto-thermal transport in a paramagnetic effective spin-1/2 magnetic insulator CsYbSe$_2$, by introducing a minimal model requiring only Zeeman splitting and magnetoelastic coupling. We use it to argue that hybridized excitations -- formed from acoustic phonons and localized spin-flip-excitations across the Zeeman gap of the crystal electric field ground doublet -- are responsible for a non-monotonic field dependence of longitudinal thermal conductivity. Beyond highlighting a starring role for phonons, our results raise the prospect of universal magneto-thermal transport phenomena in paramagnetic insulators that originate from simple features shared across many systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_01407 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Heat conduction in magnetic insulators via hybridization of acoustic phonons and spin-flip excitations Pocs, Christopher A. Leahy, Ian A. Xing, Jie Choi, Eun Sang Sefat, Athena S. Hermele, Michael Lee, Minhyea Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science We present a comprehensive study on the longitudinal magneto-thermal transport in a paramagnetic effective spin-1/2 magnetic insulator CsYbSe$_2$, by introducing a minimal model requiring only Zeeman splitting and magnetoelastic coupling. We use it to argue that hybridized excitations -- formed from acoustic phonons and localized spin-flip-excitations across the Zeeman gap of the crystal electric field ground doublet -- are responsible for a non-monotonic field dependence of longitudinal thermal conductivity. Beyond highlighting a starring role for phonons, our results raise the prospect of universal magneto-thermal transport phenomena in paramagnetic insulators that originate from simple features shared across many systems. |
| title | Heat conduction in magnetic insulators via hybridization of acoustic phonons and spin-flip excitations |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2401.01407 |