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  Large anomalous Hall effect driven by a nonvanishing Berry curvature in the noncolinear antiferromagnet Mn3Ge

Nayak, A. K., Fischer, J. E., Sun, Y., Yan, B., Karel, J., Komarek, A. C., et al. (2016). Large anomalous Hall effect driven by a nonvanishing Berry curvature in the noncolinear antiferromagnet Mn3Ge. Science Advances, 2(4): E1501870, pp. 1-5. doi:10.1126/sciadv.1501870.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-D863-F Version Permalink: http://hdl.handle.net/21.11116/0000-0001-2897-8
Genre: Journal Article

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 Creators:
Nayak, Ajaya K.1, Author              
Fischer, Julia Erika2, Author              
Sun, Yan2, Author              
Yan, Binghai3, Author              
Karel, Julie4, Author              
Komarek, Alexander C.5, Author              
Shekhar, Chandra6, Author              
Kumar, Nitesh2, Author              
Schnelle, Walter7, Author              
Kübler, Jürgen8, Author
Felser, Claudia9, Author              
Parkin, Stuart S. P.8, Author
Affiliations:
1Ajaya Nayak, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863426              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3Binghai Yan, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863427              
4Julie Karel, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863434              
5Alexander Komarek, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863446              
6Chandra Shekhar, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863428              
7Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
8External Organizations, ou_persistent22              
9Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: It is well established that the anomalous Hall effect displayed by a ferromagnet scales with its magnetization. Therefore, an antiferromagnet that has no net magnetization should exhibit no anomalous Hall effect. We show that the noncolinear triangular antiferromagnet Mn3Ge exhibits a large anomalous Hall effect comparable to that of ferromagnetic metals; the magnitude of the anomalous conductivity is ~500 (ohm·cm)−1 at 2 K and ~50 (ohm·cm)−1 at room temperature. The angular dependence of the anomalous Hall effect measurements confirms that the small residual in-plane magnetic moment has no role in the observed effect except to control the chirality of the spin triangular structure. Our theoretical calculations demonstrate that the large anomalous Hall effect in Mn3Ge originates from a nonvanishing Berry curvature that arises from the chiral spin structure, and that also results in a large spin Hall effect of 1100 (ħ/e) (ohm·cm)−1, comparable to that of platinum. The present results pave the way toward the realization of room temperature antiferromagnetic spintronics and spin Hall effect–based data storage devices.

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Language(s): eng - English
 Dates: 2016-04-152016-04-15
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1126/sciadv.1501870
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Title: Science Advances
  Other : Sci. Adv.
Source Genre: Journal
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Publ. Info: Washington : AAAS
Pages: - Volume / Issue: 2 (4) Sequence Number: E1501870 Start / End Page: 1 - 5 Identifier: Other: 2375-2548
CoNE: /journals/resource/2375-2548