Intrinsic Anomalous Nernst Effect Amplified by Disorder in a Half-Metallic Semimetal
Intrinsic anomalous Nernst effect, like its Hall counterpart, is generated by Berry curvature of electrons in solids. Little is known about its response to disorder. In contrast, the link between the amplitude of the ordinary Nernst coefficient and the mean-free path is extensively documented. Here,...
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American Physical Society
2019
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oai:doaj.org-article:adde3105ecb44ebd900fafe0a66deb5e2021-12-02T11:30:08ZIntrinsic Anomalous Nernst Effect Amplified by Disorder in a Half-Metallic Semimetal10.1103/PhysRevX.9.0410612160-3308https://doaj.org/article/adde3105ecb44ebd900fafe0a66deb5e2019-12-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.9.041061http://doi.org/10.1103/PhysRevX.9.041061https://doaj.org/toc/2160-3308Intrinsic anomalous Nernst effect, like its Hall counterpart, is generated by Berry curvature of electrons in solids. Little is known about its response to disorder. In contrast, the link between the amplitude of the ordinary Nernst coefficient and the mean-free path is extensively documented. Here, by studying Co_{3}Sn_{2}S_{2}, a topological half-metallic semimetal hosting sizable and recognizable ordinary and anomalous Nernst responses, we demonstrate an anticorrelation between the amplitudes of carrier mobility and the anomalous S_{xy}^{A} (the ratio of transverse electric field to the longitudinal temperature gradient in the absence of magnetic field). We argue that the observation, paradoxically, establishes the intrinsic origin of the anomalous Nernst effect in this system. We conclude that various intrinsic off-diagonal coefficients are set by the way the Berry curvature is averaged on a grid involving the mean-free path, the Fermi wavelength, and the de Broglie thermal length.Linchao DingJahyun KooLiangcai XuXiaokang LiXiufang LuLingxiao ZhaoQi WangQiangwei YinHechang LeiBinghai YanZengwei ZhuKamran BehniaAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 9, Iss 4, p 041061 (2019) |
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DOAJ |
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Physics QC1-999 |
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Physics QC1-999 Linchao Ding Jahyun Koo Liangcai Xu Xiaokang Li Xiufang Lu Lingxiao Zhao Qi Wang Qiangwei Yin Hechang Lei Binghai Yan Zengwei Zhu Kamran Behnia Intrinsic Anomalous Nernst Effect Amplified by Disorder in a Half-Metallic Semimetal |
| description |
Intrinsic anomalous Nernst effect, like its Hall counterpart, is generated by Berry curvature of electrons in solids. Little is known about its response to disorder. In contrast, the link between the amplitude of the ordinary Nernst coefficient and the mean-free path is extensively documented. Here, by studying Co_{3}Sn_{2}S_{2}, a topological half-metallic semimetal hosting sizable and recognizable ordinary and anomalous Nernst responses, we demonstrate an anticorrelation between the amplitudes of carrier mobility and the anomalous S_{xy}^{A} (the ratio of transverse electric field to the longitudinal temperature gradient in the absence of magnetic field). We argue that the observation, paradoxically, establishes the intrinsic origin of the anomalous Nernst effect in this system. We conclude that various intrinsic off-diagonal coefficients are set by the way the Berry curvature is averaged on a grid involving the mean-free path, the Fermi wavelength, and the de Broglie thermal length. |
| format |
article |
| author |
Linchao Ding Jahyun Koo Liangcai Xu Xiaokang Li Xiufang Lu Lingxiao Zhao Qi Wang Qiangwei Yin Hechang Lei Binghai Yan Zengwei Zhu Kamran Behnia |
| author_facet |
Linchao Ding Jahyun Koo Liangcai Xu Xiaokang Li Xiufang Lu Lingxiao Zhao Qi Wang Qiangwei Yin Hechang Lei Binghai Yan Zengwei Zhu Kamran Behnia |
| author_sort |
Linchao Ding |
| title |
Intrinsic Anomalous Nernst Effect Amplified by Disorder in a Half-Metallic Semimetal |
| title_short |
Intrinsic Anomalous Nernst Effect Amplified by Disorder in a Half-Metallic Semimetal |
| title_full |
Intrinsic Anomalous Nernst Effect Amplified by Disorder in a Half-Metallic Semimetal |
| title_fullStr |
Intrinsic Anomalous Nernst Effect Amplified by Disorder in a Half-Metallic Semimetal |
| title_full_unstemmed |
Intrinsic Anomalous Nernst Effect Amplified by Disorder in a Half-Metallic Semimetal |
| title_sort |
intrinsic anomalous nernst effect amplified by disorder in a half-metallic semimetal |
| publisher |
American Physical Society |
| publishDate |
2019 |
| url |
https://doaj.org/article/adde3105ecb44ebd900fafe0a66deb5e |
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