Experimental evidence for Zeeman spin–orbit coupling in layered antiferromagnetic conductors

Abstract Most of solid-state spin physics arising from spin–orbit coupling, from fundamental phenomena to industrial applications, relies on symmetry-protected degeneracies. So does the Zeeman spin–orbit coupling, expected to manifest itself in a wide range of antiferromagnetic conductors. Yet, expe...

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Autores principales:	R. Ramazashvili, P. D. Grigoriev, T. Helm, F. Kollmannsberger, M. Kunz, W. Biberacher, E. Kampert, H. Fujiwara, A. Erb, J. Wosnitza, R. Gross, M. V. Kartsovnik
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
Acceso en línea:	https://doaj.org/article/595509797c574e629b6c37d194867979
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spelling	oai:doaj.org-article:595509797c574e629b6c37d1948679792021-12-02T14:19:04ZExperimental evidence for Zeeman spin–orbit coupling in layered antiferromagnetic conductors10.1038/s41535-021-00309-62397-4648https://doaj.org/article/595509797c574e629b6c37d1948679792021-02-01T00:00:00Zhttps://doi.org/10.1038/s41535-021-00309-6https://doaj.org/toc/2397-4648Abstract Most of solid-state spin physics arising from spin–orbit coupling, from fundamental phenomena to industrial applications, relies on symmetry-protected degeneracies. So does the Zeeman spin–orbit coupling, expected to manifest itself in a wide range of antiferromagnetic conductors. Yet, experimental proof of this phenomenon has been lacking. Here we demonstrate that the Néel state of the layered organic superconductor κ-(BETS)2FeBr4 shows no spin modulation of the Shubnikov–de Haas oscillations, contrary to its paramagnetic state. This is unambiguous evidence for the spin degeneracy of Landau levels, a direct manifestation of the Zeeman spin–orbit coupling. Likewise, we show that spin modulation is absent in electron-doped Nd1.85Ce0.15CuO4, which evidences the presence of Néel order in this cuprate superconductor even at optimal doping. Obtained on two very different materials, our results demonstrate the generic character of the Zeeman spin–orbit coupling.R. RamazashviliP. D. GrigorievT. HelmF. KollmannsbergerM. KunzW. BiberacherE. KampertH. FujiwaraA. ErbJ. WosnitzaR. GrossM. V. KartsovnikNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Atomic physics. Constitution and properties of matterQC170-197ENnpj Quantum Materials, Vol 6, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197 R. Ramazashvili P. D. Grigoriev T. Helm F. Kollmannsberger M. Kunz W. Biberacher E. Kampert H. Fujiwara A. Erb J. Wosnitza R. Gross M. V. Kartsovnik Experimental evidence for Zeeman spin–orbit coupling in layered antiferromagnetic conductors
description	Abstract Most of solid-state spin physics arising from spin–orbit coupling, from fundamental phenomena to industrial applications, relies on symmetry-protected degeneracies. So does the Zeeman spin–orbit coupling, expected to manifest itself in a wide range of antiferromagnetic conductors. Yet, experimental proof of this phenomenon has been lacking. Here we demonstrate that the Néel state of the layered organic superconductor κ-(BETS)2FeBr4 shows no spin modulation of the Shubnikov–de Haas oscillations, contrary to its paramagnetic state. This is unambiguous evidence for the spin degeneracy of Landau levels, a direct manifestation of the Zeeman spin–orbit coupling. Likewise, we show that spin modulation is absent in electron-doped Nd1.85Ce0.15CuO4, which evidences the presence of Néel order in this cuprate superconductor even at optimal doping. Obtained on two very different materials, our results demonstrate the generic character of the Zeeman spin–orbit coupling.
format	article
author	R. Ramazashvili P. D. Grigoriev T. Helm F. Kollmannsberger M. Kunz W. Biberacher E. Kampert H. Fujiwara A. Erb J. Wosnitza R. Gross M. V. Kartsovnik
author_facet	R. Ramazashvili P. D. Grigoriev T. Helm F. Kollmannsberger M. Kunz W. Biberacher E. Kampert H. Fujiwara A. Erb J. Wosnitza R. Gross M. V. Kartsovnik
author_sort	R. Ramazashvili
title	Experimental evidence for Zeeman spin–orbit coupling in layered antiferromagnetic conductors
title_short	Experimental evidence for Zeeman spin–orbit coupling in layered antiferromagnetic conductors
title_full	Experimental evidence for Zeeman spin–orbit coupling in layered antiferromagnetic conductors
title_fullStr	Experimental evidence for Zeeman spin–orbit coupling in layered antiferromagnetic conductors
title_full_unstemmed	Experimental evidence for Zeeman spin–orbit coupling in layered antiferromagnetic conductors
title_sort	experimental evidence for zeeman spin–orbit coupling in layered antiferromagnetic conductors
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/595509797c574e629b6c37d194867979
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Experimental evidence for Zeeman spin–orbit coupling in layered antiferromagnetic conductors

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