Mn-induced Fermi-surface reconstruction in the SmFeAsO parent compound

Abstract The electronic ground state of iron-based materials is unusually sensitive to electronic correlations. Among others, its delicate balance is profoundly affected by the insertion of magnetic impurities in the FeAs layers. Here, we address the effects of Fe-to-Mn substitution in the non-super...

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Autores principales:	M. Meinero, P. Bonfà, I. J. Onuorah, S. Sanna, R. De Renzi, I. Eremin, M. A. Müller, J.-C. Orain, A. Martinelli, A. Provino, P. Manfrinetti, M. Putti, T. Shiroka, G. Lamura
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b04d10db8a91487eb771643c85a72d27
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spelling	oai:doaj.org-article:b04d10db8a91487eb771643c85a72d272021-12-02T16:08:06ZMn-induced Fermi-surface reconstruction in the SmFeAsO parent compound10.1038/s41598-021-93625-72045-2322https://doaj.org/article/b04d10db8a91487eb771643c85a72d272021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93625-7https://doaj.org/toc/2045-2322Abstract The electronic ground state of iron-based materials is unusually sensitive to electronic correlations. Among others, its delicate balance is profoundly affected by the insertion of magnetic impurities in the FeAs layers. Here, we address the effects of Fe-to-Mn substitution in the non-superconducting Sm-1111 pnictide parent compound via a comparative study of SmFe $$_{1-x}$$ 1 - x Mn $$_{x}$$ x AsO samples with $$x(\text{Mn})=$$ x ( Mn ) = 0.05 and 0.10. Magnetization, Hall effect, and muon-spin spectroscopy data provide a coherent picture, indicating a weakening of the commensurate Fe spin-density-wave (SDW) order, as shown by the lowering of the SDW transition temperature $$T_\text{SDW}$$ T SDW with increasing Mn content, and the unexpected appearance of another magnetic order, occurring at $$T^{} \approx 10$$ T ∗ ≈ 10 and 20 K for $$x=0.05$$ x = 0.05 and 0.10, respectively. We attribute the new magnetic transition at $$T^{}$$ T ∗ , occurring well inside the SDW phase, to a reorganization of the Fermi surface due to Fe-to-Mn substitutions. These give rise to enhanced magnetic fluctuations along the incommensurate wavevector $$\varvec{Q}_2 =(\pi \pm \delta ,\pi \pm \delta )$$ Q 2 = ( π ± δ , π ± δ ) , further increased by the RKKY interactions among Mn impurities.M. MeineroP. BonfàI. J. OnuorahS. SannaR. De RenziI. EreminM. A. MüllerJ.-C. OrainA. MartinelliA. ProvinoP. ManfrinettiM. PuttiT. ShirokaG. LamuraNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q M. Meinero P. Bonfà I. J. Onuorah S. Sanna R. De Renzi I. Eremin M. A. Müller J.-C. Orain A. Martinelli A. Provino P. Manfrinetti M. Putti T. Shiroka G. Lamura Mn-induced Fermi-surface reconstruction in the SmFeAsO parent compound
description	Abstract The electronic ground state of iron-based materials is unusually sensitive to electronic correlations. Among others, its delicate balance is profoundly affected by the insertion of magnetic impurities in the FeAs layers. Here, we address the effects of Fe-to-Mn substitution in the non-superconducting Sm-1111 pnictide parent compound via a comparative study of SmFe $$_{1-x}$$ 1 - x Mn $$_{x}$$ x AsO samples with $$x(\text{Mn})=$$ x ( Mn ) = 0.05 and 0.10. Magnetization, Hall effect, and muon-spin spectroscopy data provide a coherent picture, indicating a weakening of the commensurate Fe spin-density-wave (SDW) order, as shown by the lowering of the SDW transition temperature $$T_\text{SDW}$$ T SDW with increasing Mn content, and the unexpected appearance of another magnetic order, occurring at $$T^{} \approx 10$$ T ∗ ≈ 10 and 20 K for $$x=0.05$$ x = 0.05 and 0.10, respectively. We attribute the new magnetic transition at $$T^{}$$ T ∗ , occurring well inside the SDW phase, to a reorganization of the Fermi surface due to Fe-to-Mn substitutions. These give rise to enhanced magnetic fluctuations along the incommensurate wavevector $$\varvec{Q}_2 =(\pi \pm \delta ,\pi \pm \delta )$$ Q 2 = ( π ± δ , π ± δ ) , further increased by the RKKY interactions among Mn impurities.
format	article
author	M. Meinero P. Bonfà I. J. Onuorah S. Sanna R. De Renzi I. Eremin M. A. Müller J.-C. Orain A. Martinelli A. Provino P. Manfrinetti M. Putti T. Shiroka G. Lamura
author_facet	M. Meinero P. Bonfà I. J. Onuorah S. Sanna R. De Renzi I. Eremin M. A. Müller J.-C. Orain A. Martinelli A. Provino P. Manfrinetti M. Putti T. Shiroka G. Lamura
author_sort	M. Meinero
title	Mn-induced Fermi-surface reconstruction in the SmFeAsO parent compound
title_short	Mn-induced Fermi-surface reconstruction in the SmFeAsO parent compound
title_full	Mn-induced Fermi-surface reconstruction in the SmFeAsO parent compound
title_fullStr	Mn-induced Fermi-surface reconstruction in the SmFeAsO parent compound
title_full_unstemmed	Mn-induced Fermi-surface reconstruction in the SmFeAsO parent compound
title_sort	mn-induced fermi-surface reconstruction in the smfeaso parent compound
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b04d10db8a91487eb771643c85a72d27
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Mn-induced Fermi-surface reconstruction in the SmFeAsO parent compound

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