Observation of converse flexoelectric effect in topological semimetals

Takahashi, Hidefumi; Kurosaka, Yusuke; Kimura, Kenta; Nakano, Akitoshi; Ishiwata, Shintaro

doi:https://doi.org/10.1038/s43246-024-00677-z

Observation of converse flexoelectric effect in topological semimetals

Takahashi, Hidefumi; Kurosaka, Yusuke; Kimura, Kenta et al.

Communications Materials, 2024, 5, 236

アクセス数:440件（2025-07-19 11:37 集計）

固定URL: https://hdl.handle.net/11094/98557

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タイトル	Observation of converse flexoelectric effect in topological semimetals
著者	NRID 1000050748473 1000050748473 ORCID 0000-0001-7721-5163 0000-0001-7721-5163 researchmap permalink -taka -taka Scopus Author ID 36680887000 36680887000 著者名 Takahashi, Hidefumi
	著者名 Kurosaka, Yusuke
	著者名 Kimura, Kenta
	NRID 1000050842613 1000050842613 著者名 Nakano, Akitoshi
	NRID 1000000525355 1000000525355 ORCID 0000-0003-1696-2514 0000-0003-1696-2514 researchmap permalink ishiwata ishiwata Scopus Author ID 7103346934 7103346934 著者名 Ishiwata, Shintaro
内容	Takahashi H., Kurosaka Y., Kimura K., et al. Observation of converse flexoelectric effect in topological semimetals. Communications Materials 5, 236 (2024); https://doi.org/10.1038/s43246-024-00677-z.
抄録	A strong coupling between electric polarization and elastic deformation in solids is an important　factor in creating useful electromechanical nanodevices. Such coupling is typically allowed in insulating materials with inversion symmetry breaking as exemplified by the piezoelectric effect in ferroelectric materials. Therefore, materials with metallicity and centrosymmetry have tended to be out of scope in this perspective. Here, we report the observation of giant elastic deformation by the application of an alternating electric current in topological semimetals (V,Mo)Te2, regardless of the centrosymmetry. Considering the crystal and band structures and the asymmetric measurement configurations in addition to the absence of the electromechanical effect in a trivial semimetal TiTe2, the observed effect is discussed in terms of a Berry-phase-derived converse flexoelectric effect in metals. The observation of the flexoelectric effect in topological semimetals paves a way for a new type of nanoscale electromechanical sensors and energy harvesting.
出版者	Springer Nature
収録物名	Communications Materials
巻(号)	5
ページ	236
刊行年月	2024-10-24
言語	英語
ハンドルURL	https://hdl.handle.net/11094/98557
eISSN	26624443
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1038/s43246-024-00677-z
アクセス権	open access
権利情報	This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
出版タイプ	Version of Record
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCTERMS.bibliographicCitation	Communications Materials. 2024, 5, p. 236
DC.title	Observation of converse flexoelectric effect in topological semimetals
DC.creator	Takahashi, Hidefumi
	Kurosaka, Yusuke
	Kimura, Kenta
	Nakano, Akitoshi
	Ishiwata, Shintaro
DC.publisher	Springer Nature
DC.language' scheme='DCTERMS.RFC1766	英語
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2024-10-24
DC.identifier	https://doi.org/10.1038/s43246-024-00677-z
DC.description	Takahashi H., Kurosaka Y., Kimura K., et al. Observation of converse flexoelectric effect in topological semimetals. Communications Materials 5, 236 (2024); https://doi.org/10.1038/s43246-024-00677-z.
DCTERMS.abstract	A strong coupling between electric polarization and elastic deformation in solids is an important　factor in creating useful electromechanical nanodevices. Such coupling is typically allowed in insulating materials with inversion symmetry breaking as exemplified by the piezoelectric effect in ferroelectric materials. Therefore, materials with metallicity and centrosymmetry have tended to be out of scope in this perspective. Here, we report the observation of giant elastic deformation by the application of an alternating electric current in topological semimetals (V,Mo)Te2, regardless of the centrosymmetry. Considering the crystal and band structures and the asymmetric measurement configurations in addition to the absence of the electromechanical effect in a trivial semimetal TiTe2, the observed effect is discussed in terms of a Berry-phase-derived converse flexoelectric effect in metals. The observation of the flexoelectric effect in topological semimetals paves a way for a new type of nanoscale electromechanical sensors and energy harvesting.
DC.rights	This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
DC.format	98557
citation_title	Observation of converse flexoelectric effect in topological semimetals
citation_author	Takahashi, Hidefumi
	Kurosaka, Yusuke
	Kimura, Kenta
	Nakano, Akitoshi
	Ishiwata, Shintaro
citation_publisher	Springer Nature
citation_language	英語
citation_date	2024-10-24
citation_journal_title	Communications Materials
citation_volume	5
citation_firstpage	236
citation_doi	https://doi.org/10.1038/s43246-024-00677-z
citation_public_url	https://hdl.handle.net/11094/98557

Observation of converse flexoelectric effect in topological semimetals

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