Universität zu Köln

Ding, Linchao ORCID: 0000-0002-6859-0321, Koo, Jahyun, Xu, Liangcai ORCID: 0000-0003-4366-3392, Li, Xiaokang, Lu, Xiufang, Zhao, Lingxiao, Wang, Qi, Yin, Qiangwei, Lei, Hechang, Yan, Binghai ORCID: 0000-0003-2164-5839, Zhu, Zengwei and Behnia, Kamran (2019). Intrinsic Anomalous Nernst Effect Amplified by Disorder in a Half-Metallic Semimetal. Phys. Rev. X, 9 (4). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2160-3308

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Abstract

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 Co3Sn2S2, 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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Ding, Linchao UNSPECIFIED orcid.org/0000-0002-6859-0321 UNSPECIFIED Koo, Jahyun UNSPECIFIED UNSPECIFIED UNSPECIFIED Xu, Liangcai UNSPECIFIED orcid.org/0000-0003-4366-3392 UNSPECIFIED Li, Xiaokang UNSPECIFIED UNSPECIFIED UNSPECIFIED Lu, Xiufang UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhao, Lingxiao UNSPECIFIED UNSPECIFIED UNSPECIFIED Wang, Qi UNSPECIFIED UNSPECIFIED UNSPECIFIED Yin, Qiangwei UNSPECIFIED UNSPECIFIED UNSPECIFIED Lei, Hechang UNSPECIFIED UNSPECIFIED UNSPECIFIED Yan, Binghai UNSPECIFIED orcid.org/0000-0003-2164-5839 UNSPECIFIED Zhu, Zengwei UNSPECIFIED UNSPECIFIED UNSPECIFIED Behnia, Kamran UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-123985
DOI:	10.1103/PhysRevX.9.041061
Journal or Publication Title:	Phys. Rev. X
Volume:	9
Number:	4
Date:	2019
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2160-3308
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language Physics, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/12398