Role of magnetic ions in the thermal Hall effect of the paramagnetic insulator TmVO$_{4}$
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866916333952696320 |
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| author | Vallipuram, Ashvini Chen, Lu Campillo, Emma Mezidi, Manel Grissonnanche, Gaël Boulanger, Marie-Eve Lefrançois, Étienne Zic, Mark P. Li, Yuntian Fisher, Ian R. Baglo, Jordan Taillefer, Louis |
| author_facet | Vallipuram, Ashvini Chen, Lu Campillo, Emma Mezidi, Manel Grissonnanche, Gaël Boulanger, Marie-Eve Lefrançois, Étienne Zic, Mark P. Li, Yuntian Fisher, Ian R. Baglo, Jordan Taillefer, Louis |
| contents | In a growing number of materials, phonons have been found to generate a thermal Hall effect, but the underlying mechanism remains unclear. Inspired by previous studies that revealed the importance of Tb$^{3+}$ ions in generating the thermal Hall effect in a family of pyrochlores, we investigated the role of Tm$^{3+}$ ions in TmVO$_{4}$, a paramagnetic insulator with a different crystal structure. We observe a negative thermal Hall conductivity in TmVO$_{4}$ with a magnitude such that the Hall angle, $|κ_{xy}$/$κ_{xx}|$, is approximately 1 x 10$^{-3}$ at $H$ = 15 T and $T$ = 20 K, typical for a phonon-generated thermal Hall effect. In contrast to the negligible $κ_{xy}$ found in the nonmagnetic pyrochlore analog (where the Tb$^{3+}$ ions are replaced with Y$^{3+}$), we observe a negative $κ_{xy}$ in YVO$_{4}$ with a Hall angle of magnitude comparable to that of TmVO$_{4}$. This shows that the Tm$^{3+}$ ions are not essential for the thermal Hall effect in this family of materials. Interestingly, at an intermediate Y concentration of $x$ = 0.3 in Tm$_{1-x}$Y$_{x}$VO$_{4}$, $κ_{xy}$ was found to have a positive sign, pointing to the importance of impurities in the thermal Hall effect of phonons. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_10643 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Role of magnetic ions in the thermal Hall effect of the paramagnetic insulator TmVO$_{4}$ Vallipuram, Ashvini Chen, Lu Campillo, Emma Mezidi, Manel Grissonnanche, Gaël Boulanger, Marie-Eve Lefrançois, Étienne Zic, Mark P. Li, Yuntian Fisher, Ian R. Baglo, Jordan Taillefer, Louis Materials Science Strongly Correlated Electrons In a growing number of materials, phonons have been found to generate a thermal Hall effect, but the underlying mechanism remains unclear. Inspired by previous studies that revealed the importance of Tb$^{3+}$ ions in generating the thermal Hall effect in a family of pyrochlores, we investigated the role of Tm$^{3+}$ ions in TmVO$_{4}$, a paramagnetic insulator with a different crystal structure. We observe a negative thermal Hall conductivity in TmVO$_{4}$ with a magnitude such that the Hall angle, $|κ_{xy}$/$κ_{xx}|$, is approximately 1 x 10$^{-3}$ at $H$ = 15 T and $T$ = 20 K, typical for a phonon-generated thermal Hall effect. In contrast to the negligible $κ_{xy}$ found in the nonmagnetic pyrochlore analog (where the Tb$^{3+}$ ions are replaced with Y$^{3+}$), we observe a negative $κ_{xy}$ in YVO$_{4}$ with a Hall angle of magnitude comparable to that of TmVO$_{4}$. This shows that the Tm$^{3+}$ ions are not essential for the thermal Hall effect in this family of materials. Interestingly, at an intermediate Y concentration of $x$ = 0.3 in Tm$_{1-x}$Y$_{x}$VO$_{4}$, $κ_{xy}$ was found to have a positive sign, pointing to the importance of impurities in the thermal Hall effect of phonons. |
| title | Role of magnetic ions in the thermal Hall effect of the paramagnetic insulator TmVO$_{4}$ |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2310.10643 |