Theory of Resistivity Upturns in Metallic Cuprates
Superconductivity
2009-10-26 v1
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.
Keywords
Cite
@article{arxiv.0905.1449,
title = {Theory of Resistivity Upturns in Metallic Cuprates},
author = {W. Chen and Brian M. Andersen and P. J. Hirschfeld},
journal= {arXiv preprint arXiv:0905.1449},
year = {2009}
}
Comments
8 pages, 7 figures, submitted to PRB