The sample-dependent and sample-independent thermal transport properties of $α$-RuCl$_3$
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866909074372689920 |
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| author | Zhang, Heda May, Andrew Miao, Hu Sales, Brian Mandrus, David Nagler, Stephen McGuire, Michael Yan, Jiaqiang |
| author_facet | Zhang, Heda May, Andrew Miao, Hu Sales, Brian Mandrus, David Nagler, Stephen McGuire, Michael Yan, Jiaqiang |
| contents | We investigated the thermal transport properties of two $α$-RuCl$_3$ crystals with different degrees of stacking disorder to understand the origin of the previously reported oscillatory feature in the field dependence of thermal conductivity. Crystal I shows only one magnetic order around 13\,K, which is near the highest T$_N$ for $α$-RuCl$_3$ with stacking faults. Crystal II has less stacking disorder, with a dominant heat capacity at 7.6\,K along with weak anomalies at 10\,K and 13\,K. In the temperature and field dependence of thermal conductivity, no obvious anomaly was observed to be associated with the magnetic order around 13\,K for either crystal or around 10\,K for crystal II. Crystal II, with less disorder, showed clear oscillations in the field dependence of thermal conductivity, while crystal I, with more disorder, did not. For crystal I, an L-shaped region in the temperature-field space was observed where thermal Hall conductivity $κ_{xy}$/T is within $\pm$20\% of the half quantized thermal Hall conductivity $κ_{HQ}$/T. While for crystal II, $κ_{xy}$/T reaches $κ_{HQ}$/T only in the high field and high temperature regime with no indication of a plateau at $κ_{HQ}$/T. Our thermal conductivity data suggest the oscillatory features are inherent to the zig-zag ordered phase with T$_N$ near 7\,K. Our planar thermal Hall effect measurements highlight the sensitivity of this phenomena to stacking disorder. Overall, our results highlight the importance of understanding and controlling crystallographic disorder for obtaining and interpreting intrinsic thermal transport properties in $α$-RuCl$_3$. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2303_02098 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | The sample-dependent and sample-independent thermal transport properties of $α$-RuCl$_3$ Zhang, Heda May, Andrew Miao, Hu Sales, Brian Mandrus, David Nagler, Stephen McGuire, Michael Yan, Jiaqiang Materials Science Strongly Correlated Electrons We investigated the thermal transport properties of two $α$-RuCl$_3$ crystals with different degrees of stacking disorder to understand the origin of the previously reported oscillatory feature in the field dependence of thermal conductivity. Crystal I shows only one magnetic order around 13\,K, which is near the highest T$_N$ for $α$-RuCl$_3$ with stacking faults. Crystal II has less stacking disorder, with a dominant heat capacity at 7.6\,K along with weak anomalies at 10\,K and 13\,K. In the temperature and field dependence of thermal conductivity, no obvious anomaly was observed to be associated with the magnetic order around 13\,K for either crystal or around 10\,K for crystal II. Crystal II, with less disorder, showed clear oscillations in the field dependence of thermal conductivity, while crystal I, with more disorder, did not. For crystal I, an L-shaped region in the temperature-field space was observed where thermal Hall conductivity $κ_{xy}$/T is within $\pm$20\% of the half quantized thermal Hall conductivity $κ_{HQ}$/T. While for crystal II, $κ_{xy}$/T reaches $κ_{HQ}$/T only in the high field and high temperature regime with no indication of a plateau at $κ_{HQ}$/T. Our thermal conductivity data suggest the oscillatory features are inherent to the zig-zag ordered phase with T$_N$ near 7\,K. Our planar thermal Hall effect measurements highlight the sensitivity of this phenomena to stacking disorder. Overall, our results highlight the importance of understanding and controlling crystallographic disorder for obtaining and interpreting intrinsic thermal transport properties in $α$-RuCl$_3$. |
| title | The sample-dependent and sample-independent thermal transport properties of $α$-RuCl$_3$ |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2303.02098 |