Dzyaloshinskii–Moriya interaction in noncentrosymmetric superlattices

Abstract Dzyaloshinskii–Moriya interaction (DMI) is considered as one of the most important energies for specific chiral textures such as magnetic skyrmions. The keys of generating DMI are the absence of structural inversion symmetry and exchange energy with spin–orbit coupling. Therefore, a vast ma...

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Autores principales:	Woo Seung Ham, Abdul-Muizz Pradipto, Kay Yakushiji, Kwangsu Kim, Sonny H. Rhim, Kohji Nakamura, Yoichi Shiota, Sanghoon Kim, Teruo Ono
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Computer software QA76.75-76.765
Acceso en línea:	https://doaj.org/article/01827316ab6e48cfbae0bb9203ed43b2
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spelling	oai:doaj.org-article:01827316ab6e48cfbae0bb9203ed43b22021-12-02T15:08:10ZDzyaloshinskii–Moriya interaction in noncentrosymmetric superlattices10.1038/s41524-021-00592-82057-3960https://doaj.org/article/01827316ab6e48cfbae0bb9203ed43b22021-08-01T00:00:00Zhttps://doi.org/10.1038/s41524-021-00592-8https://doaj.org/toc/2057-3960Abstract Dzyaloshinskii–Moriya interaction (DMI) is considered as one of the most important energies for specific chiral textures such as magnetic skyrmions. The keys of generating DMI are the absence of structural inversion symmetry and exchange energy with spin–orbit coupling. Therefore, a vast majority of research activities about DMI are mainly limited to heavy metal/ferromagnet bilayer systems, only focusing on their interfaces. Here, we report an asymmetric band formation in a superlattices (SL) which arises from inversion symmetry breaking in stacking order of atomic layers, implying the role of bulk-like contribution. Such bulk DMI is more than 300% larger than simple sum of interfacial contribution. Moreover, the asymmetric band is largely affected by strong spin–orbit coupling, showing crucial role of a heavy metal even in the non-interfacial origin of DMI. Our work provides more degrees of freedom to design chiral magnets for spintronics applications.Woo Seung HamAbdul-Muizz PradiptoKay YakushijiKwangsu KimSonny H. RhimKohji NakamuraYoichi ShiotaSanghoon KimTeruo OnoNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Computer softwareQA76.75-76.765ENnpj Computational Materials, Vol 7, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Computer software QA76.75-76.765
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Computer software QA76.75-76.765 Woo Seung Ham Abdul-Muizz Pradipto Kay Yakushiji Kwangsu Kim Sonny H. Rhim Kohji Nakamura Yoichi Shiota Sanghoon Kim Teruo Ono Dzyaloshinskii–Moriya interaction in noncentrosymmetric superlattices
description	Abstract Dzyaloshinskii–Moriya interaction (DMI) is considered as one of the most important energies for specific chiral textures such as magnetic skyrmions. The keys of generating DMI are the absence of structural inversion symmetry and exchange energy with spin–orbit coupling. Therefore, a vast majority of research activities about DMI are mainly limited to heavy metal/ferromagnet bilayer systems, only focusing on their interfaces. Here, we report an asymmetric band formation in a superlattices (SL) which arises from inversion symmetry breaking in stacking order of atomic layers, implying the role of bulk-like contribution. Such bulk DMI is more than 300% larger than simple sum of interfacial contribution. Moreover, the asymmetric band is largely affected by strong spin–orbit coupling, showing crucial role of a heavy metal even in the non-interfacial origin of DMI. Our work provides more degrees of freedom to design chiral magnets for spintronics applications.
format	article
author	Woo Seung Ham Abdul-Muizz Pradipto Kay Yakushiji Kwangsu Kim Sonny H. Rhim Kohji Nakamura Yoichi Shiota Sanghoon Kim Teruo Ono
author_facet	Woo Seung Ham Abdul-Muizz Pradipto Kay Yakushiji Kwangsu Kim Sonny H. Rhim Kohji Nakamura Yoichi Shiota Sanghoon Kim Teruo Ono
author_sort	Woo Seung Ham
title	Dzyaloshinskii–Moriya interaction in noncentrosymmetric superlattices
title_short	Dzyaloshinskii–Moriya interaction in noncentrosymmetric superlattices
title_full	Dzyaloshinskii–Moriya interaction in noncentrosymmetric superlattices
title_fullStr	Dzyaloshinskii–Moriya interaction in noncentrosymmetric superlattices
title_full_unstemmed	Dzyaloshinskii–Moriya interaction in noncentrosymmetric superlattices
title_sort	dzyaloshinskii–moriya interaction in noncentrosymmetric superlattices
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/01827316ab6e48cfbae0bb9203ed43b2
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Dzyaloshinskii–Moriya interaction in noncentrosymmetric superlattices

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