Similar glassy features in the NMR response of pure and disordered La1.88Sr0.12CuO4

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dc.creatorMitrovic, V. F.
dc.creatorJulien, M. -H.
dc.creatorde Vaulx, C.
dc.creatorHorvatic, M.
dc.creatorBerthier, C.
dc.creatorSuzuki, T.
dc.creatorYamada, K.
dc.date2008-06-02
dc.date.accessioned2026-07-07T12:11:48Z
dc.date.available2026-07-07T12:11:48Z
dc.descriptionHigh Tc superconductivity in La2-xSrxCuO4 coexists with (striped and glassy) magnetic order. Here, we report NMR measurements of the 139La spin-lattice relaxation, which displays a stretched-exponential time dependence, in both pure and disordered x=0.12 single crystals. An analysis in terms of a distribution of relaxation rates T1^-1 indicates that i) the spin-freezing temperature is spatially inhomogeneous with an onset at Tg(onset)=20 K for the pristine samples, and ii) the width of the T1^-1 distribution in the vicinity of Tg(onset) is insensitive to an ~1% level of atomic disorder in CuO2 planes. This suggests that the stretched-exponential 139La relaxation, considered as a manifestation of the systems glassiness, may not arise from quenched disorder.
dc.description7 pages, to be published in Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/0806.0207
dc.identifierhttp://arxiv.org/abs/0806.0207
dc.identifierPhys. Rev. B 78, 014504 (2008)
dc.identifierdoi:10.1103/PhysRevB.78.014504
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/210340
dc.subjectSuperconductivity
dc.titleSimilar glassy features in the NMR response of pure and disordered La1.88Sr0.12CuO4
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