Dimensional crossover and anomalous magnetoresistivity in single crystals $Na_xCoO_2$

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dc.creatorWang, C. H.
dc.creatorChen, X. H.
dc.creatorLuo, J. L.
dc.creatorLiu, G. T.
dc.creatorLu, X. X.
dc.creatorZhang, H. T.
dc.creatorWang, G. Y.
dc.creatorLuo, X. G.
dc.creatorWang, N. L.
dc.date2004-11-02
dc.date.accessioned2026-07-07T03:01:50Z
dc.date.available2026-07-07T03:01:50Z
dc.descriptionThe in-plane ($ρ_{ab}$) and c-axis ($ρ_c$) resistivities, and the magnetoresistivity of single crystals $Na_xCoO_2$ with x = 0.7, 0.5 and 0.3 were studied systematically. $ρ_{ab}(T)$ shows similar temperature dependence between $Na_{0.3}CoO_2$ and $Na_{0.7}CoO_2$, while $ρ_c(T)$ is quite different. A dimensional crossover from two to three occurs with decreasing Na concentration from 0.7 to 0.3. The angular dependence of in-plane magnetoresistivity for 0.5 sample shows a \emph{"d-wave-like"} symmetry at 2K, while the \emph{"p-wave-like"} symmetry at 20 K. These results give an evidence for existence of a \emph{spin ordering orientation} below 20 K turned by external field, like the stripes in cuprates.
dc.description4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0411050
dc.identifierhttp://arxiv.org/abs/cond-mat/0411050
dc.identifierPhys. Rev. B 71, 224515 (2005)
dc.identifierdoi:10.1103/PhysRevB.71.224515
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/25193
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleDimensional crossover and anomalous magnetoresistivity in single crystals $Na_xCoO_2$
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