Model forc-axis transport in high-Tccuprates

We present a model for the c-axis resistivity ${\mathrm{\rho }}_{\mathit{c}}$ in the cuprates which incorporates interplanar disorder. Higher-order perturbative calculations demonstrate that this special disorder stabilizes a low-T metallic state and in the dynamical limit leads to temperature-dependent slopes d${\mathrm{\rho }}_{\mathit{c}}$/dT which are negative (positive) for low (high) hole concentrations. Predictions are presented for correlations which associate a nonlinear planar resistivity with the magnitude of negative d${\mathrm{\rho }}_{\mathit{c}}$/dT.