Spin-polarized electrons in atomic layer materials formed on solid surfaces

Sakamoto, Kazuyuki; Kobayashi, Takahiro; Yaji, Koichiro; Shishidou, Tatsuya; Donath, Markus

doi:https://doi.org/10.1016/j.progsurf.2022.100665

Spin-polarized electrons in atomic layer materials formed on solid surfaces

Sakamoto, Kazuyuki; Kobayashi, Takahiro; Yaji, Koichiro et al.

Progress in Surface Science, 2022, 97(3), 100665

アクセス数:485件（2025-07-19 07:58 集計）

固定URL: https://hdl.handle.net/11094/88579

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タイトル	Spin-polarized electrons in atomic layer materials formed on solid surfaces
著者	NRID 1000070261542 1000070261542 ORCID 0000-0001-9507-6435 0000-0001-9507-6435 researchmap permalink read0184558 read0184558 Scopus Author ID 7403538529 7403538529 著者名 Sakamoto, Kazuyuki
	著者名 Kobayashi, Takahiro
	NRID 1000050447447 1000050447447 著者名 Yaji, Koichiro
	NRID 1000020363046 1000020363046 著者名 Shishidou, Tatsuya
	著者名 Donath, Markus
キーワード等	Atomic layer materials
	Rashba effect
	Spin-polarized band
	Symmetry
	Orbital angular momuntum
抄録	In this review, we summarize the recent progress in the understanding of the spin-polarized electronic states in two-dimensional (2D) atomic layer materials (ALMs) formed on solid surfaces. The spin-polarized electronic states caused by the combination of spin-orbit coupling (SOC) with broken spatial inversion symmetry along the surface normal direction is one of the most exotic phenomena that appears on ALMs formed on solid surfaces as well as clean solid surfaces. The so-called Rashba-Bychkov (RB) effect that arises from the potential gradient induced by broken inversion symmetry was believed to be the main origin of these spin-polarized electronic states. However, the spin texture of most ALMs are different from that caused by the ideal RB effect. Due to the high impact of the spin-polarized electronic states of 2D materials in not only spin-related fundamental science but also in applications since they are the key concepts to realize future semiconductor spintronics devices, much efforts have been made to elucidate the origin of these peculiar spin textures. So far, the deviations in spin texture from the ideal one have been attributed to be induced by perturbation, such as entanglement of spin and orbital momenta. In this review, we first illustrate how the symmetry of the ALM's atomic structure can affect the spin texture, and then introduce that various spin textures, ranging from the RB-type and symmetry-induced type to spin textures that cannot be explained based on the origins proposed so far, can be simply induced by the orbital angular momentum. This review aims to provide an overview on the insights gained on the spin-polarized electronic states of ALMs and to point out opportunities for exploring exotic physical properties when combining spin and other physics, e.g. superconductivity, and to realize future spintronics-based quantum devices.
出版者	Elsevier
収録物名	Progress in Surface Science
巻(号)	97(3)
ページ	100665
刊行年月	2022-08
言語	英語
ハンドルURL	https://hdl.handle.net/11094/88579
PISSN	00796816
関連情報 (isVersionOf)	DOI (出版社版) https://doi.org/10.1016/j.progsurf.2022.100665
アクセス権	open access
権利情報	© 2022. This manuscript version is made available under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
出版タイプ	Accepted Manuscript
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
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Progress in Surface Science. 2022, 97(3), p. 100665
DC.title	Spin-polarized electrons in atomic layer materials formed on solid surfaces
DC.creator	Sakamoto, Kazuyuki
	Kobayashi, Takahiro
	Yaji, Koichiro
	Shishidou, Tatsuya
	Donath, Markus
DC.publisher	Elsevier
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2022-08
DC.identifier	https://doi.org/10.1016/j.progsurf.2022.100665
DC.subject	Atomic layer materials
	Rashba effect
	Spin-polarized band
	Symmetry
	Orbital angular momuntum
DCTERMS.abstract	In this review, we summarize the recent progress in the understanding of the spin-polarized electronic states in two-dimensional (2D) atomic layer materials (ALMs) formed on solid surfaces. The spin-polarized electronic states caused by the combination of spin-orbit coupling (SOC) with broken spatial inversion symmetry along the surface normal direction is one of the most exotic phenomena that appears on ALMs formed on solid surfaces as well as clean solid surfaces. The so-called Rashba-Bychkov (RB) effect that arises from the potential gradient induced by broken inversion symmetry was believed to be the main origin of these spin-polarized electronic states. However, the spin texture of most ALMs are different from that caused by the ideal RB effect. Due to the high impact of the spin-polarized electronic states of 2D materials in not only spin-related fundamental science but also in applications since they are the key concepts to realize future semiconductor spintronics devices, much efforts have been made to elucidate the origin of these peculiar spin textures. So far, the deviations in spin texture from the ideal one have been attributed to be induced by perturbation, such as entanglement of spin and orbital momenta. In this review, we first illustrate how the symmetry of the ALM's atomic structure can affect the spin texture, and then introduce that various spin textures, ranging from the RB-type and symmetry-induced type to spin textures that cannot be explained based on the origins proposed so far, can be simply induced by the orbital angular momentum. This review aims to provide an overview on the insights gained on the spin-polarized electronic states of ALMs and to point out opportunities for exploring exotic physical properties when combining spin and other physics, e.g. superconductivity, and to realize future spintronics-based quantum devices.
DC.rights	© 2022. This manuscript version is made available under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
DC.format	88579
citation_title	Spin-polarized electrons in atomic layer materials formed on solid surfaces
citation_author	Sakamoto, Kazuyuki
	Kobayashi, Takahiro
	Yaji, Koichiro
	Shishidou, Tatsuya
	Donath, Markus
citation_publisher	Elsevier
citation_language	英語
citation_date	2022-08
citation_journal_title	Progress in Surface Science
citation_volume	97
citation_issue	3
citation_firstpage	100665
citation_doi	https://doi.org/10.1016/j.progsurf.2022.100665
citation_public_url	https://hdl.handle.net/11094/88579

Spin-polarized electrons in atomic layer materials formed on solid surfaces

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