Superconductivity in a ferroelectric-like topological semimetal SrAuBi

Takahashi, Hidefumi; Sasaki, Tomohiro; Nakano, Akitoshi; Akiba, Kazuto; Takahashi, Masayuki; Mayo, Alex H.; Onose, Masaho; Kobayashi, Tatsuo C.; Ishiwata, Shintaro

doi:https://doi.org/10.1038/s41535-023-00612-4

Superconductivity in a ferroelectric-like topological semimetal SrAuBi

Takahashi, Hidefumi; Sasaki, Tomohiro; Nakano, Akitoshi et al.

npj Quantum Materials, 2023, 8(1), 77

Number of Access:807（2025-11-05 02:08 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/93534

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Title	Superconductivity in a ferroelectric-like topological semimetal SrAuBi
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 Sasaki, Tomohiro
	NRID 1000050842613 1000050842613 CreatorName Nakano, Akitoshi
	NRID 1000060824026 1000060824026 CreatorName Akiba, Kazuto
	CreatorName Takahashi, Masayuki
	CreatorName Mayo, Alex H.
	CreatorName Onose, Masaho
	NRID 1000080205468 1000080205468 CreatorName Kobayashi, Tatsuo C.
	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., Sasaki T., Nakano A., et al. Superconductivity in a ferroelectric-like topological semimetal SrAuBi. npj Quantum Materials 8, 77 (2023); https://doi.org/10.1038/s41535-023-00612-4.
Abstract	Given the rarity of metallic systems that exhibit ferroelectric-like transitions, it is apparently challenging to find a system that simultaneously possesses superconductivity and ferroelectric-like structural instability. Here, we report the observation of superconductivity at 2.4 K in a layered semimetal SrAuBi characterized by strong spin–orbit coupling (SOC) and ferroelectric-like lattice distortion. Single crystals of SrAuBi have been successfully synthesized and found to show a polar-nonpolar structure transition at 214 K, which is associated with the buckling of Au-Bi honeycomb lattice. On the basis of the band calculations considering SOC, we found significant Rashba-type spin splitting and symmetry-protected multiple Dirac points near the Fermi level. We believe that this discovery opens up new possibilities of pursuing exotic superconducting states associated with the semimetallic band structure without space inversion symmetry and the topological surface state with the strong SOC.
Publisher	Nature Research
Source Title	npj Quantum Materials
Volume (Issue)	8(1)
Page	77
Date of Issued	2023-12-20
Language	English
Handle URL	https://hdl.handle.net/11094/93534
eISSN	23974648
Relation.isIdenticalTo	DOI (Publisher Version) https://doi.org/10.1038/s41535-023-00612-4
Access Rights	open access
CopyRight	This article is licensed under a Creative Commons Attribution 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
DCMI Type	Text
DCTERMS.bibliographicCitation	npj Quantum Materials. 2023, 8(1), p. 77
DC.title	Superconductivity in a ferroelectric-like topological semimetal SrAuBi
DC.creator	Takahashi, Hidefumi
	Sasaki, Tomohiro
	Nakano, Akitoshi
	Akiba, Kazuto
	Takahashi, Masayuki
	Mayo, Alex H.
	Onose, Masaho
	Kobayashi, Tatsuo C.
	Ishiwata, Shintaro
DC.publisher	Nature Research
DC.language' scheme='DCTERMS.RFC1766	English
DC.type' scheme='DCTERMS.DCMIType	Text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2023-12-20
DC.identifier	https://doi.org/10.1038/s41535-023-00612-4
DC.description	Takahashi H., Sasaki T., Nakano A., et al. Superconductivity in a ferroelectric-like topological semimetal SrAuBi. npj Quantum Materials 8, 77 (2023); https://doi.org/10.1038/s41535-023-00612-4.
DCTERMS.abstract	Given the rarity of metallic systems that exhibit ferroelectric-like transitions, it is apparently challenging to find a system that simultaneously possesses superconductivity and ferroelectric-like structural instability. Here, we report the observation of superconductivity at 2.4 K in a layered semimetal SrAuBi characterized by strong spin–orbit coupling (SOC) and ferroelectric-like lattice distortion. Single crystals of SrAuBi have been successfully synthesized and found to show a polar-nonpolar structure transition at 214 K, which is associated with the buckling of Au-Bi honeycomb lattice. On the basis of the band calculations considering SOC, we found significant Rashba-type spin splitting and symmetry-protected multiple Dirac points near the Fermi level. We believe that this discovery opens up new possibilities of pursuing exotic superconducting states associated with the semimetallic band structure without space inversion symmetry and the topological surface state with the strong SOC.
DC.rights	This article is licensed under a Creative Commons Attribution 4.0 International License.
DC.format	93534
citation_title	Superconductivity in a ferroelectric-like topological semimetal SrAuBi
citation_author	Takahashi, Hidefumi
	Sasaki, Tomohiro
	Nakano, Akitoshi
	Akiba, Kazuto
	Takahashi, Masayuki
	Mayo, Alex H.
	Onose, Masaho
	Kobayashi, Tatsuo C.
	Ishiwata, Shintaro
citation_publisher	Nature Research
citation_language	English
citation_date	2023-12-20
citation_journal_title	npj Quantum Materials
citation_volume	8
citation_issue	1
citation_firstpage	77
citation_doi	https://doi.org/10.1038/s41535-023-00612-4
citation_public_url	https://hdl.handle.net/11094/93534

Superconductivity in a ferroelectric-like topological semimetal SrAuBi

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