气候变化领域集成服务门户(CCPortal): Nonreciprocity of spin waves in the conical helix state

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DOI	10.1073/pnas.2022927118
	Nonreciprocity of spin waves in the conical helix state
	Ogawa N.; Köhler L.; Garst M.; Toyoda S.; Seki S.; Tokura Y.
发表日期	2021
ISSN	00278424
卷号	118 期号:8
英文摘要	Nonreciprocity emerges in nature and in artificial objects from various physical origins, being widely utilized in contemporary technologies as exemplified by diode elements in electronics. While most of the nonreciprocal phenomena are realized by employing interfaces where the inversion symmetry is trivially lifted, nonreciprocal transport of photons, electrons, magnons, and possibly phonons also emerge in bulk crystals with broken space inversion and time reversal symmetries. Among them, directional propagation of bulk magnons (i.e., quanta of spin wave excitation) is attracting much attention nowadays for its potentially large nonreciprocity suitable for spintronic and spincaloritronic applications. Here, we demonstrate nonreciprocal propagation of spin waves for the conical spin helix state in Cu2OSeO3 due to a combination of dipole and Dzyaloshinskii–Moriya interactions. The observed nonreciprocal spin dispersion smoothly connects to the hitherto known magnetochiral nonreciprocity in the field-induced collinear spin state; thus, all the spin phases show diode characteristics in this chiral insulator. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Conical spin helix; Nonreciprocity; Spin wave
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180585
作者单位	RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan; Department of Applied Physics, University of Tokyo, Tokyo, 113-8656, Japan; PRESTO, Japan Science and Technology Agency (JST), Kawaguchi, 332-0012, Japan; Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology, Karlsruhe, 76049, Germany; Institute for Quantum Materials and Technology, Karlsruhe Institute of Technology, Karlsruhe, 76021, Germany; Tokyo College, University of Tokyo, Tokyo, 113-8656, Japan
推荐引用方式 GB/T 7714	Ogawa N.,Köhler L.,Garst M.,et al. Nonreciprocity of spin waves in the conical helix state[J],2021,118(8).
APA	Ogawa N.,Köhler L.,Garst M.,Toyoda S.,Seki S.,&Tokura Y..(2021).Nonreciprocity of spin waves in the conical helix state.Proceedings of the National Academy of Sciences of the United States of America,118(8).
MLA	Ogawa N.,et al."Nonreciprocity of spin waves in the conical helix state".Proceedings of the National Academy of Sciences of the United States of America 118.8(2021).