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  Anomalous Hall effect and the role of Berry curvature in Co2TiSn Heusler films

Ernst, B., Sahoo, R., Sun, Y., Nayak, J., Müchler, L., Nayak, A. K., et al. (2019). Anomalous Hall effect and the role of Berry curvature in Co2TiSn Heusler films. Physical Review B, 100(5): 054445, pp. 1-7. doi:10.1103/PhysRevB.100.054445.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-ABAF-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-ABB3-1
Genre: Journal Article

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 Creators:
Ernst, Benedikt1, Author              
Sahoo, Roshnee1, Author              
Sun, Yan1, Author              
Nayak, Jayita1, Author              
Müchler, Lukas1, Author              
Nayak, Ajaya K.2, Author
Kumar, Nitesh1, Author              
Gayles, Jacob1, Author              
Markou, Anastasios1, Author              
Fecher, Gerhard H.3, Author              
Felser, Claudia4, Author              
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2External Organizations, ou_persistent22              
3Gerhard Fecher, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863431              
4Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: Various Co-2-based Heusler compounds are predicted to be half-metallic ferromagnets with Weyl points. These systems with lack of time inversion symmetry possess a momentum space Berry curvature that can introduce exotic transport properties. The present study, on epitaxially grown Co2TiSn films, is an approach to understand and explore this possibility. The theoretical investigation shows that the Berry curvature is significant for the total anomalous Hall effect in experimentally grown Co2TiSn films. The deviation between the theory and experiment is due to the influence of side jump and skew scattering mechanisms. From a theoretical point of view, the intrinsic contribution to the anomalous Hall effect originates from partially gaped nodal lines due to the symmetry reduction induced by the lack of time reversal symmetry. Furthermore, from hard x-ray photoelectron spectroscopy measurements, we establish an electronic structure in the film that is comparable to the theoretical density of states calculations. These results provide intuitive insight into Heusler spintronics rooted in topological electronic structure.

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Language(s): eng - English
 Dates: 2019-08-282019-08-28
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
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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 (5) Sequence Number: 054445 Start / End Page: 1 - 7 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008