Dirac Magnon Nodal Loops in Quasi-2D Quantum Magnets

Abstract In this report, we propose a new concept of one-dimensional (1D) closed lines of Dirac magnon nodes in two-dimensional (2D) momentum space of quasi-2D quantum magnetic systems. They are termed “2D Dirac magnon nodal-line loops”. We utilize the bilayer honeycomb ferromagnets with intralayer...

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Autor principal:	S. A. Owerre
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e5ae0e929f634289a972c0e80dc1861f
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spelling	oai:doaj.org-article:e5ae0e929f634289a972c0e80dc1861f2021-12-02T15:05:30ZDirac Magnon Nodal Loops in Quasi-2D Quantum Magnets10.1038/s41598-017-07276-82045-2322https://doaj.org/article/e5ae0e929f634289a972c0e80dc1861f2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07276-8https://doaj.org/toc/2045-2322Abstract In this report, we propose a new concept of one-dimensional (1D) closed lines of Dirac magnon nodes in two-dimensional (2D) momentum space of quasi-2D quantum magnetic systems. They are termed “2D Dirac magnon nodal-line loops”. We utilize the bilayer honeycomb ferromagnets with intralayer coupling J and interlayer coupling J L , which is realizable in the honeycomb chromium compounds CrX3 (X ≡ Br, Cl, and I). However, our results can also exist in other layered quasi-2D quantum magnetic systems. Here, we show that the magnon bands of the bilayer honeycomb ferromagnets overlap for J L ≠ 0 and form 1D closed lines of Dirac magnon nodes in 2D momentum space. The 2D Dirac magnon nodal-line loops are topologically protected by inversion and time-reversal symmetry. Furthermore, we show that they are robust against weak Dzyaloshinskii-Moriya interaction Δ DM < J L and possess chiral magnon edge modes.S. A. OwerreNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q S. A. Owerre Dirac Magnon Nodal Loops in Quasi-2D Quantum Magnets
description	Abstract In this report, we propose a new concept of one-dimensional (1D) closed lines of Dirac magnon nodes in two-dimensional (2D) momentum space of quasi-2D quantum magnetic systems. They are termed “2D Dirac magnon nodal-line loops”. We utilize the bilayer honeycomb ferromagnets with intralayer coupling J and interlayer coupling J L , which is realizable in the honeycomb chromium compounds CrX3 (X ≡ Br, Cl, and I). However, our results can also exist in other layered quasi-2D quantum magnetic systems. Here, we show that the magnon bands of the bilayer honeycomb ferromagnets overlap for J L ≠ 0 and form 1D closed lines of Dirac magnon nodes in 2D momentum space. The 2D Dirac magnon nodal-line loops are topologically protected by inversion and time-reversal symmetry. Furthermore, we show that they are robust against weak Dzyaloshinskii-Moriya interaction Δ DM < J L and possess chiral magnon edge modes.
format	article
author	S. A. Owerre
author_facet	S. A. Owerre
author_sort	S. A. Owerre
title	Dirac Magnon Nodal Loops in Quasi-2D Quantum Magnets
title_short	Dirac Magnon Nodal Loops in Quasi-2D Quantum Magnets
title_full	Dirac Magnon Nodal Loops in Quasi-2D Quantum Magnets
title_fullStr	Dirac Magnon Nodal Loops in Quasi-2D Quantum Magnets
title_full_unstemmed	Dirac Magnon Nodal Loops in Quasi-2D Quantum Magnets
title_sort	dirac magnon nodal loops in quasi-2d quantum magnets
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/e5ae0e929f634289a972c0e80dc1861f
work_keys_str_mv	AT saowerre diracmagnonnodalloopsinquasi2dquantummagnets
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Dirac Magnon Nodal Loops in Quasi-2D Quantum Magnets

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