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

Number of Access:513（2025-11-05 05:12 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/98557

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Title	Observation of converse flexoelectric effect in topological semimetals
Creator	NRID 1000050748473 1000050748473 ORCID 0000-0001-7721-5163 0000-0001-7721-5163 researchmap permalink -taka -taka Scopus Author ID 36680887000 36680887000 CreatorName Takahashi, Hidefumi
	CreatorName Kurosaka, Yusuke
	CreatorName Kimura, Kenta
	NRID 1000050842613 1000050842613 CreatorName Nakano, Akitoshi
	NRID 1000000525355 1000000525355 ORCID 0000-0003-1696-2514 0000-0003-1696-2514 researchmap permalink ishiwata ishiwata Scopus Author ID 7103346934 7103346934 CreatorName Ishiwata, Shintaro
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.
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.
Publisher	Springer Nature
Source Title	Communications Materials
Volume (Issue)	5
Page	236
Date of Issued	2024-10-24
Language	English
Handle URL	https://hdl.handle.net/11094/98557
eISSN	26624443
Relation.isIdenticalTo	DOI (Publisher Version) https://doi.org/10.1038/s43246-024-00677-z
Access Rights	open access
CopyRight	This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
oaire:version	Version of Record
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
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	English
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	English
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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