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  Weyl fermions in antiferromagnetic Mn3Sn and Mn3Ge

Kübler, J., & Felser, C. (2017). Weyl fermions in antiferromagnetic Mn3Sn and Mn3Ge. EPL, 120(4): 47002, pp. 1-5. doi:10.1209/0295-5075/120/47002.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-8D11-E Version Permalink: http://hdl.handle.net/21.11116/0000-0001-EF00-2
Genre: Journal Article

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Kübler, J.1, Author              
Felser, C.2, Author              
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: The anomalous Hall effect in the noncollinear antiferromagnetic metals Mn3Ge and Mn3Sn has been observed after a theoretical prediction made by us (KUBLER J. and FELSER C., EPL, 108 (2014) 67001). The experimental values of the anomalous Hall conductivities (AHC) are large as are the theoretical values. Recently measured thermoelectric properties mirror the large AHC and clearly show that the transport is by quasiparticles at the Fermi energy. We here make an attempt to unravel the origin of the large AHC and show that both Mn3Sn and Mn3Ge host Weyl points, which were recently discovered in semimetals. For this purpose we determine the electronic structure ab initio in the local spin-density functional approximation. The Weyl points are found to occur below the Fermi energy and we argue that spots of large Berry flux ("hot spots") that are seen at the Fermi surface are produced by the Weyl nodes. Copyright (C) EPLA, 2018

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Language(s): eng - English
 Dates: 2017-12-232017-12-23
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: DOI: 10.1209/0295-5075/120/47002
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Title: EPL
  Other : EPL: A Letters Journal Exploring the Frontiers of Physics
Source Genre: Journal
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Publ. Info: Les-Ulis : EDP Science
Pages: - Volume / Issue: 120 (4) Sequence Number: 47002 Start / End Page: 1 - 5 Identifier: Other: 0295-5075
CoNE: https://pure.mpg.de/cone/journals/resource/0295-5075