Anisotropic in-plane heat transport of Kitaev magnet Na$_2$Co$_2$TeO$_6$
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arXiv
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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866929390613430272 |
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| author | Guang, Shuangkui Li, Na Huang, Qing Xia, Ke Wang, Yiyan Liang, Hui Sun, Yan Li, Qiuju Zhao, Xia Luo, Rui Leonard Chen, Gang Zhou, Haidong Sun, Xuefeng |
| author_facet | Guang, Shuangkui Li, Na Huang, Qing Xia, Ke Wang, Yiyan Liang, Hui Sun, Yan Li, Qiuju Zhao, Xia Luo, Rui Leonard Chen, Gang Zhou, Haidong Sun, Xuefeng |
| contents | We report a study on low-temperature heat transport of Kitaev magnet Na$_2$Co$_2$TeO$_6$, with the heat current and magnetic fields along the honeycomb spin layer (the $ab$ plane). The zero-field thermal conductivity of $κ^a_{xx}$ and $κ^{a*}_{xx}$ display similar temperature dependence and small difference in their magnitudes; whereas, their magnetic field (parallel to the heat current) dependence are quite different and are related to the field-induced magnetic transitions. The $κ^a_{xx}(B)$ data for $B \parallel a$ at very low temperatures have an anomaly at 10.25--10.5 T, which reveals an unexplored magnetic transition. The planar thermal Hall conductivity $κ^a_{xy}$ and $κ^{a*}_{xy}$ show very weak signals at low fields and rather large values with sign change at high fields. This may point to a possible magnetic structure transition or the change of the magnon band topology that induces a radical change of magnon Berry curvature distribution before entering the spin polarized state. These results put clear constraints on the high-field phase and the theoretical models for Na$_2$Co$_2$TeO$_6$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_06316 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Anisotropic in-plane heat transport of Kitaev magnet Na$_2$Co$_2$TeO$_6$ Guang, Shuangkui Li, Na Huang, Qing Xia, Ke Wang, Yiyan Liang, Hui Sun, Yan Li, Qiuju Zhao, Xia Luo, Rui Leonard Chen, Gang Zhou, Haidong Sun, Xuefeng Strongly Correlated Electrons We report a study on low-temperature heat transport of Kitaev magnet Na$_2$Co$_2$TeO$_6$, with the heat current and magnetic fields along the honeycomb spin layer (the $ab$ plane). The zero-field thermal conductivity of $κ^a_{xx}$ and $κ^{a*}_{xx}$ display similar temperature dependence and small difference in their magnitudes; whereas, their magnetic field (parallel to the heat current) dependence are quite different and are related to the field-induced magnetic transitions. The $κ^a_{xx}(B)$ data for $B \parallel a$ at very low temperatures have an anomaly at 10.25--10.5 T, which reveals an unexplored magnetic transition. The planar thermal Hall conductivity $κ^a_{xy}$ and $κ^{a*}_{xy}$ show very weak signals at low fields and rather large values with sign change at high fields. This may point to a possible magnetic structure transition or the change of the magnon band topology that induces a radical change of magnon Berry curvature distribution before entering the spin polarized state. These results put clear constraints on the high-field phase and the theoretical models for Na$_2$Co$_2$TeO$_6$. |
| title | Anisotropic in-plane heat transport of Kitaev magnet Na$_2$Co$_2$TeO$_6$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2307.06316 |