Small polarons and c-axis transport in highly anisotropic metals

Details Small polarons and c-axis transport in highly anisotropic metals Small polarons and c-axis transport in highly anisotropic metals

2002-11-28

arxiv.org/abs/cond-mat/0211675v1

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

Motivated by the anomalous c-axis transport properties of the quasi two-dimensional metal, $\rm Sr_2 Ru O_4$, and related compounds, we have studied the interlayer hopping of single electrons that are coupled strongly to c-axis bosons. We find a c-axis resistivity that reflects the in-plane electronic scattering in the low and very high temperature limits (relative to the characteristic temperature of the boson $T_{\rm boson}$). For temperatures near the $T_{\rm boson}$, a broad maximum in the resistivity can appear for sufficiently strong electron-boson coupling. This feature may account for the observed ``metallic to non-metallic crossover'' seen in these layered oxides, where the boson may be a phonon.

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