High-resolution Measurements of Thermal Conductivity Matrix and Search for Thermal Hall Effect in La$_2$CuO$_4$
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908470648766464 |
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| author | Hu, Jiayi Xu, Haozhi Yao, Juntao Gu, Genda Li, Qiang Ong, N. P. |
| author_facet | Hu, Jiayi Xu, Haozhi Yao, Juntao Gu, Genda Li, Qiang Ong, N. P. |
| contents | We investigated the longitudinal thermal conductivity $κ_{xx}$ and thermal hall conductivity $κ_{xy}$ in La$_2$CuO$_4$ at temperatures $T$ between 2 and 20 K in magnetic fields $H$ up to 10 T. Within the temperature and field intervals studied, we do not resolve any thermal Hall signal with a conservative upper bound of $|κ_{xy}/T| <1\times10^{-4}$ ${\rm Wm^{-1}K^{-2}}$. The longitudinal thermal conductivity $κ_{xx}/T$ agrees well with previous studies, in both magnitude and $T$ dependence. In both channels, we performed measurements using the field-sweep protocol. To achieve high resolution, we carefully took into account relaxation effects after each step-increase in $H$. At low $T$, we find a linear decrease in $κ/T$ vs. $H$, as well as weak hysteresis near the meta-magnetic transition of the spin degrees. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2507_21403 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | High-resolution Measurements of Thermal Conductivity Matrix and Search for Thermal Hall Effect in La$_2$CuO$_4$ Hu, Jiayi Xu, Haozhi Yao, Juntao Gu, Genda Li, Qiang Ong, N. P. Strongly Correlated Electrons We investigated the longitudinal thermal conductivity $κ_{xx}$ and thermal hall conductivity $κ_{xy}$ in La$_2$CuO$_4$ at temperatures $T$ between 2 and 20 K in magnetic fields $H$ up to 10 T. Within the temperature and field intervals studied, we do not resolve any thermal Hall signal with a conservative upper bound of $|κ_{xy}/T| <1\times10^{-4}$ ${\rm Wm^{-1}K^{-2}}$. The longitudinal thermal conductivity $κ_{xx}/T$ agrees well with previous studies, in both magnitude and $T$ dependence. In both channels, we performed measurements using the field-sweep protocol. To achieve high resolution, we carefully took into account relaxation effects after each step-increase in $H$. At low $T$, we find a linear decrease in $κ/T$ vs. $H$, as well as weak hysteresis near the meta-magnetic transition of the spin degrees. |
| title | High-resolution Measurements of Thermal Conductivity Matrix and Search for Thermal Hall Effect in La$_2$CuO$_4$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2507.21403 |