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  Berry curvature unravelled by the anomalous Nernst effect in Mn3Ge

Wuttke, C., Caglieris, F., Sykora, S., Scaravaggi, F., Wolter, A. U. B., Manna, K., et al. (2019). Berry curvature unravelled by the anomalous Nernst effect in Mn3Ge. Physical Review B, 100(8): 085111, pp. 1-10. doi:10.1103/PhysRevB.100.085111.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-8742-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-8747-4
Genre: Journal Article

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 Creators:
Wuttke, Christoph1, Author
Caglieris, Federico1, Author
Sykora, Steffen1, Author
Scaravaggi, Francesco1, Author
Wolter, Anja U. B.1, Author
Manna, Kaustuv2, Author              
Süss, Vicky2, Author              
Shekhar, Chandra3, Author              
Felser, Claudia4, Author              
Büchner, Bernd1, Author
Hess, Christian1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3Chandra Shekhar, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863428              
4Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: The discovery of topological quantum materials represents a striking innovation in modern condensed matter physics with remarkable fundamental and technological implications. Their classification has been recently extended to topological Weyl semimetals, i.e., solid-state systems which exhibit the elusive Weyl fermions as low-energy excitations. Here we show that the Nernst effect can be exploited as a sensitive probe for determining key parameters of the Weyl physics, applying it to the noncollinear antiferromagnet Mn3Ge. This compound exhibits anomalous thermoelectric transport due to enhanced Berry curvature from Weyl points located extremely close to the Fermi level. We establish from our data a direct measure of the Berry curvature at the Fermi level and, using a minimal model of a Weyl semimetal, extract the Weyl point energy and their distance in momentum space.

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Language(s): eng - English
 Dates: 2019-08-052019-08-05
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1103/PhysRevB.100.085111
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 100 (8) Sequence Number: 085111 Start / End Page: 1 - 10 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008