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ID 61362
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Akiba, Kazuto Graduate School of Natural Science and Technology, Okayama University ORCID Kaken ID researchmap
Iwamoto, Kaisei Graduate School of Natural Science and Technology, Okayama University
Sato, Takaaki Graduate School of Natural Science and Technology, Okayama University
Araki, Shingo Graduate School of Natural Science and Technology, Okayama University ORCID Kaken ID publons researchmap
Kobayashi, Tatsuo C. Graduate School of Natural Science and Technology, Okayama University ORCID Kaken ID publons researchmap
Abstract
Recent interest in topological nature in condensed matter physics has revealed the essential role of Berry curvature in the anomalous Hall effect (AHE). However, since a large Hall response originating from Berry curvature has been reported in quite limited materials, the detailed mechanism remains unclear at present. Here, we report the discovery of a large AHE triggered by a pressure-induced magnetic phase transition in elemental α-Mn. The AHE is absent in the noncollinear antiferromagnetic phase at ambient pressure, whereas a large AHE is observed in the weak ferromagnetic phase under high pressure despite the small magnetization of ≈0.02μB/Mn. Our results indicate that the emergence of the AHE in α-Mn is governed by the symmetry of the underlying magnetic structure, providing a direct evidence of a switch between a zero and nonzero contribution of the Berry curvature across the phase boundary. α-Mn can be an elemental and tunable platform to reveal the role of Berry curvature in AHE.
Published Date
2020-10-16
Publication Title
Physical Review Research
Volume
volume2
Issue
issue4
Publisher
American Physical Society
Start Page
043090
ISSN
2643-1564
Content Type
Journal Article
language
英語
OAI-PMH Set
岡山大学
Copyright Holders
© Authors.
File Version
publisher
DOI
Web of Science KeyUT
Related Url
isVersionOf https://doi.org/10.1103/PhysRevResearch.2.043090
License
https://creativecommons.org/licenses/by/4.0/
Funder Name
Japan Society for the Promotion of Science
助成番号
18K03517
18H04323