Skyrmion crystals in centrosymmetric itinerant magnets without horizontal mirror plane

Abstract We theoretically investigate a new stabilization mechanism of a skyrmion crystal (SkX) in centrosymmetric itinerant magnets with magnetic anisotropy. By considering a trigonal crystal system without the horizontal mirror plane, we derive an effective spin model with an anisotropic Ruderman–...

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Autores principales:	Ryota Yambe, Satoru Hayami
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fbeca1e385f54273bb6324a72f9ef734
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spelling	oai:doaj.org-article:fbeca1e385f54273bb6324a72f9ef7342021-12-02T14:49:10ZSkyrmion crystals in centrosymmetric itinerant magnets without horizontal mirror plane10.1038/s41598-021-90308-12045-2322https://doaj.org/article/fbeca1e385f54273bb6324a72f9ef7342021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-90308-1https://doaj.org/toc/2045-2322Abstract We theoretically investigate a new stabilization mechanism of a skyrmion crystal (SkX) in centrosymmetric itinerant magnets with magnetic anisotropy. By considering a trigonal crystal system without the horizontal mirror plane, we derive an effective spin model with an anisotropic Ruderman–Kittel–Kasuya–Yosida (RKKY) interaction for a multi-band periodic Anderson model. We find that the anisotropic RKKY interaction gives rise to two distinct SkXs with different skyrmion numbers of one and two depending on a magnetic field. We also clarify that a phase arising from the multiple-Q spin density waves becomes a control parameter for a field-induced topological phase transition between the SkXs. The mechanism will be useful not only for understanding the SkXs, such as that in Gd $$_2$$ 2 PdSi $$_3$$ 3 , but also for exploring further skyrmion-hosting materials in trigonal itinerant magnets.Ryota YambeSatoru HayamiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ryota Yambe Satoru Hayami Skyrmion crystals in centrosymmetric itinerant magnets without horizontal mirror plane
description	Abstract We theoretically investigate a new stabilization mechanism of a skyrmion crystal (SkX) in centrosymmetric itinerant magnets with magnetic anisotropy. By considering a trigonal crystal system without the horizontal mirror plane, we derive an effective spin model with an anisotropic Ruderman–Kittel–Kasuya–Yosida (RKKY) interaction for a multi-band periodic Anderson model. We find that the anisotropic RKKY interaction gives rise to two distinct SkXs with different skyrmion numbers of one and two depending on a magnetic field. We also clarify that a phase arising from the multiple-Q spin density waves becomes a control parameter for a field-induced topological phase transition between the SkXs. The mechanism will be useful not only for understanding the SkXs, such as that in Gd $$_2$$ 2 PdSi $$_3$$ 3 , but also for exploring further skyrmion-hosting materials in trigonal itinerant magnets.
format	article
author	Ryota Yambe Satoru Hayami
author_facet	Ryota Yambe Satoru Hayami
author_sort	Ryota Yambe
title	Skyrmion crystals in centrosymmetric itinerant magnets without horizontal mirror plane
title_short	Skyrmion crystals in centrosymmetric itinerant magnets without horizontal mirror plane
title_full	Skyrmion crystals in centrosymmetric itinerant magnets without horizontal mirror plane
title_fullStr	Skyrmion crystals in centrosymmetric itinerant magnets without horizontal mirror plane
title_full_unstemmed	Skyrmion crystals in centrosymmetric itinerant magnets without horizontal mirror plane
title_sort	skyrmion crystals in centrosymmetric itinerant magnets without horizontal mirror plane
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/fbeca1e385f54273bb6324a72f9ef734
work_keys_str_mv	AT ryotayambe skyrmioncrystalsincentrosymmetricitinerantmagnetswithouthorizontalmirrorplane AT satoruhayami skyrmioncrystalsincentrosymmetricitinerantmagnetswithouthorizontalmirrorplane
_version_	1718389546578608128

Skyrmion crystals in centrosymmetric itinerant magnets without horizontal mirror plane

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