Anisotropic transport properties of single-crystal La2−xSrxCuO4: Evidence for the dimensional crossover

Abstract

The anisotropic normal-state transport properties, resistivity and thermopower, are investigated for high-quality single crystals of ${\mathrm{La}}_{2\mathrm{-}\mathit{x}}$ ${\mathrm{Sr}}_{\mathit{x}}$ ${\mathrm{CuO}}_4$ in the compositional range 0.10≤x≤0.30. The results indicate that charge transport in the material with superconducting compositions is two-dimensional. A crossover from two to three dimensions is observed at high temperature or on entering the nonsuperconducting overdoped region.