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  Thickness dependence of the anomalous Nernst effect and the Mott relation of Weyl semimetal Co2MnGa thin films

Park, G.-H., Reichlova, H., Schlitz, R., Lammel, M., Markou, A., Swekis, P., et al. (2020). Thickness dependence of the anomalous Nernst effect and the Mott relation of Weyl semimetal Co2MnGa thin films. Physical Review B, 101(6): 060406, pp. 1-7. doi:10.1103/PhysRevB.101.060406.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-C6F0-C Version Permalink: http://hdl.handle.net/21.11116/0000-0006-0D1F-B
Genre: Journal Article

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Park, Gyu-Hyeon1, Author
Reichlova, Helena1, Author
Schlitz, Richard1, Author
Lammel, Michaela1, Author
Markou, Anastasios2, Author              
Swekis, Peter2, Author              
Ritzinger, Philipp1, Author
Kriegner, Dominik2, Author              
Noky, Jonathan2, Author              
Gayles, Jacob2, Author              
Sun, Yan2, Author              
Felser, Claudia3, Author              
Nielsch, Kornelius1, Author
Goennenwein, Sebastian T. B.1, Author
Thomas, Andy1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: We report a robust anomalous Nernst effect in Co2MnGa thin films in the thickness regime between 20 and 50 nm. The anomalous Nernst coefficient varied in the range of -2.0 to -3.0 mu V/K at 300 K. We demonstrate that the anomalous Hall and Nernst coefficients exhibit similar behavior and fulfill the Mott relation. We simultaneously measure all four transport coefficients of the longitudinal resistivity, transversal resistivity, Seebeck coefficient, and anomalous Nernst coefficient. We connect the values of the measured and calculated Nernst conductivity by using the remaining three magnetothermal transport coefficients, where the Mott relation is still valid. The intrinsic Berry curvature dominates the transport due to the relation between the longitudinal and transversal transport. Therefore, we conclude that the Mott relationship is applicable to describe the magnetothermoelectric transport in Weyl semimetal Co2MnGa as a function of film thickness.

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Language(s): eng - English
 Dates: 2020-02-192020-02-19
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1103/PhysRevB.101.060406
 Degree: -

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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: 101 (6) Sequence Number: 060406 Start / End Page: 1 - 7 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008