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arXiv · 0905.1449

Theory of Resistivity Upturns in Metallic Cuprates

W. Chen·Brian M. Andersen·P. J. Hirschfeld
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Abstract

We propose that the experimentally observed resistivity upturn of cuprates at low temperatures may be explained by properly accounting for the effects of disorder in a strongly correlated metallic host. Within a calculation of the DC conductivity using real-space diagonalization of a Hubbard model treated in an inhomogeneous unrestricted Hartree-Fock approximation, we find that correlations induce magnetic droplets around impurities, and give rise to additional magnetic scattering which causes the resistivity upturn. A pseudogap in the density of states is shown to enhance both the disorder-induced magnetic state and the resistivity upturns.

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W. Chen, Brian M. Andersen, P. J. Hirschfeld. 2009-05-10. Theory of Resistivity Upturns in Metallic Cuprates. https://doi.org/10.1103/physrevb.80.134518

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