Oxygen isotope effects in high-quality thin films of manganites: Quantitative constraints on the physics of manganites

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dc.creatorZhao, G. M.
dc.creatorKang, D. J.
dc.creatorPrellier, W.
dc.creatorRajeswari, M.
dc.creatorKeller, H.
dc.creatorVenkatesan, T.
dc.creatorGreene, R. L.
dc.date1999-12-20
dc.date.accessioned2026-07-07T03:15:44Z
dc.date.available2026-07-07T03:15:44Z
dc.descriptionOxygen isotope effects on the transport properties have been studied in high-quality epitaxial thin films of La_{0.75}Ca_{0.25}MnO_{3} and Nd_{0.7}Sr_{0.3}MnO_{3}. In the paramagnetic state, the resistivity can be well fitted by ρ(T) = (A/\sqrt{T})\exp(E_ρ/k_{B}T) with the parameters A and E_{a} depending strongly on the oxygen isotope mass. The resistivity below 80 K almost perfectly follows ρ= ρ_{o}+ Bω_{s}/\sinh^{2}(\hbarω_{s}/2k_{B}T) with \hbarω_{s}/k_{B} \sim 100 K. Both ρ_{o} and B increase by about 15(3)% upon raplacing $^{16}$O by $^{18}$O. The results provide quantitative constraints on the basic physics of manganites.
dc.description4 pages, 3 figures, submitted to PRL
dc.identifierhttps://arxiv.org/abs/cond-mat/9912355
dc.identifierhttp://arxiv.org/abs/cond-mat/9912355
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/30090
dc.subjectStrongly Correlated Electrons
dc.titleOxygen isotope effects in high-quality thin films of manganites: Quantitative constraints on the physics of manganites
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