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Abstract
The long-range order of noncoplanar magnetic textures with scalar spin chirality (SSC) can couple to conduction electrons to produce an additional (termed geometrical or topological) Hall effect. One such example is the Hall effect in the skyrmion lattice state with quantized SSC. An alternative route to attain a finite SSC is via the spin canting caused by thermal fluctuations in the vicinity of the ferromagnetic ordering transition. Here, we report that for a highly conducting ferromagnet with a two-dimensional array of spin trimers, the thermally generated SSC can give rise to a gigantic geometrical Hall conductivity even larger than the intrinsic anomalous Hall conductivity of the ground state. We also demonstrate that the SSC induced by thermal fluctuations leads to a strong response in the Nernst effect. A comparison of the sign and magnitude of fluctuation–Nernst and Hall responses in fundamental units indicates the need for a momentum–space picture to model these thermally induced signals.
Citations
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8
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Authors (9)
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Max Hirschberger
- RIKEN Center for Emergent Matter Science
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Jan Masell
- RIKEN Center for Emergent Matter Science
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Shang Gao
- RIKEN Center for Emergent Matter Science
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Akiko Kikkawa
- RIKEN Center for Emergent Matter Science
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Yasujiro Taguchi
- RIKEN Center for Emergent Matter Science
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Taka-hisa Arima
- RIKEN Center for Emergent Matter Science
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Naoto Nagaosa
- RIKEN Center for Emergent Matter Science
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Yoshinori Tokura
- RIKEN Center for Emergent Matter Science
Cite as
Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1073/pnas.2023588118
- License
- Copyright (2021 National Academy of Sciences)
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
no. 118,
pages 1 - 7,
ISSN: 0027-8424 - Language:
- English
- Publication year:
- 2021
- Bibliographic description:
- Kolincio K., Hirschberger M., Masell J., Gao S., Kikkawa A., Taguchi Y., Arima T., Nagaosa N., Tokura Y.: Large Hall and Nernst responses from thermally induced spin chirality in a spin-trimer ferromagnet// PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA -Vol. 118,iss. 33 (2021), s.1-7
- DOI:
- Digital Object Identifier (open in new tab) 10.1073/pnas.2023588118
- Verified by:
- Gdańsk University of Technology
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