Coexistence of static magnetism and superconductivity in SmFeAsO1-xFx as revealed by muon spin rotation

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dc.creatorDrew, A. J.
dc.creatorNiedermayer, Ch.
dc.creatorBaker, P. J.
dc.creatorPratt, F. L.
dc.creatorBlundell, S. J.
dc.creatorLancaster, T.
dc.creatorLiu, R. H.
dc.creatorWu, G.
dc.creatorChen, X. H.
dc.creatorWatanabe, I.
dc.creatorMalik, V. K.
dc.creatorDubroka, A.
dc.creatorRoessle, M.
dc.creatorKim, K. W.
dc.creatorBaines, C.
dc.creatorBernhard, C.
dc.date2008-07-30
dc.date2009-01-29
dc.date.accessioned2026-07-07T12:45:49Z
dc.date.available2026-07-07T12:45:49Z
dc.descriptionThe recent observation of superconductivity with critical temperatures up to 55 K in the FeAs based pnictide compounds marks the first discovery of a non copper-oxide based layered high-Tc superconductor (HTSC) [1-3]. It has raised the suspicion that these new materials share a similar pairing mechanism to the cuprates, since both exhibit superconductivity following charge doping of a magnetic parent material. Here we present a muon spin rotation study on SmFeAsO1-xFx (x=0-0.30), which shows that static magnetism persists well into the superconducting regime. The analogy with the cuprates is quite surprising since the parent compounds appear to have different magnetic ground states: itinerant spin density wave for the pnictides contrasted with the Mott-Hubbard insulator in the cuprates. Our findings suggest that proximity to magnetic order and associated soft magnetic fluctuations, rather than the strong electronic correlations in the vicinity of a Mott-Hubbard-metal-to-insulator transition, may be the key ingredients of HTSC.
dc.descriptionAccepted in Nature Materials
dc.identifierhttps://arxiv.org/abs/0807.4876
dc.identifierhttp://arxiv.org/abs/0807.4876
dc.identifierdoi:10.1038/nmat2396
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/221174
dc.subjectSuperconductivity
dc.titleCoexistence of static magnetism and superconductivity in SmFeAsO1-xFx as revealed by muon spin rotation
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