Magnetic moment evolution and spin freezing in doped BaFe2As2

Abstract Fe-K β X-ray emission spectroscopy measurements reveal an asymmetric doping dependence of the magnetic moments μ bare in electron- and hole-doped BaFe2As2. At low temperature, μ bare is nearly constant in hole-doped samples, whereas it decreases upon electron doping. Increasing temperature...

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Autores principales:	Jonathan Pelliciari, Yaobo Huang, Kenji Ishii, Chenglin Zhang, Pengcheng Dai, Gen Fu Chen, Lingyi Xing, Xiancheng Wang, Changqing Jin, Hong Ding, Philipp Werner, Thorsten Schmitt
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/36339debb21e4517acfc461989fc8f89
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spelling	oai:doaj.org-article:36339debb21e4517acfc461989fc8f892021-12-02T16:06:46ZMagnetic moment evolution and spin freezing in doped BaFe2As210.1038/s41598-017-07286-62045-2322https://doaj.org/article/36339debb21e4517acfc461989fc8f892017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07286-6https://doaj.org/toc/2045-2322Abstract Fe-K β X-ray emission spectroscopy measurements reveal an asymmetric doping dependence of the magnetic moments μ bare in electron- and hole-doped BaFe2As2. At low temperature, μ bare is nearly constant in hole-doped samples, whereas it decreases upon electron doping. Increasing temperature substantially enhances μ bare in the hole-doped region, which is naturally explained by the theoretically predicted crossover into a spin-frozen state. Our measurements demonstrate the importance of Hund’s-coupling and electronic correlations, especially for hole-doped BaFe2As2, and the inadequacy of a fully localized or fully itinerant description of the 122 family of Fe pnictides.Jonathan PelliciariYaobo HuangKenji IshiiChenglin ZhangPengcheng DaiGen Fu ChenLingyi XingXiancheng WangChangqing JinHong DingPhilipp WernerThorsten SchmittNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jonathan Pelliciari Yaobo Huang Kenji Ishii Chenglin Zhang Pengcheng Dai Gen Fu Chen Lingyi Xing Xiancheng Wang Changqing Jin Hong Ding Philipp Werner Thorsten Schmitt Magnetic moment evolution and spin freezing in doped BaFe2As2
description	Abstract Fe-K β X-ray emission spectroscopy measurements reveal an asymmetric doping dependence of the magnetic moments μ bare in electron- and hole-doped BaFe2As2. At low temperature, μ bare is nearly constant in hole-doped samples, whereas it decreases upon electron doping. Increasing temperature substantially enhances μ bare in the hole-doped region, which is naturally explained by the theoretically predicted crossover into a spin-frozen state. Our measurements demonstrate the importance of Hund’s-coupling and electronic correlations, especially for hole-doped BaFe2As2, and the inadequacy of a fully localized or fully itinerant description of the 122 family of Fe pnictides.
format	article
author	Jonathan Pelliciari Yaobo Huang Kenji Ishii Chenglin Zhang Pengcheng Dai Gen Fu Chen Lingyi Xing Xiancheng Wang Changqing Jin Hong Ding Philipp Werner Thorsten Schmitt
author_facet	Jonathan Pelliciari Yaobo Huang Kenji Ishii Chenglin Zhang Pengcheng Dai Gen Fu Chen Lingyi Xing Xiancheng Wang Changqing Jin Hong Ding Philipp Werner Thorsten Schmitt
author_sort	Jonathan Pelliciari
title	Magnetic moment evolution and spin freezing in doped BaFe2As2
title_short	Magnetic moment evolution and spin freezing in doped BaFe2As2
title_full	Magnetic moment evolution and spin freezing in doped BaFe2As2
title_fullStr	Magnetic moment evolution and spin freezing in doped BaFe2As2
title_full_unstemmed	Magnetic moment evolution and spin freezing in doped BaFe2As2
title_sort	magnetic moment evolution and spin freezing in doped bafe2as2
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/36339debb21e4517acfc461989fc8f89
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Magnetic moment evolution and spin freezing in doped BaFe2As2

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