Band-theory analysis of anisotropic transport inLa2CuO4-based superconductors

Abstract

The anisotropic resistivity ${\rho }_{\alpha \alpha }$ and Hall coefficient $R_{\alpha \beta \gamma }$ of ${\mathrm{La}}_{2-x}{M}_x\mathrm{Cu}{\mathrm{O}}_4$ are analyzed as a function of $x$, using a rigid-band treatment of the previously given linearized augmented planewave bands of tetragonal ${\mathrm{La}}_2$Cu${\mathrm{O}}_4$. The experimental ${\rho }_{\mathrm{xx}}\mathrm{}\left(T\right)\mathrm{}$ is used to extract ${\lambda }_{\mathrm{tr}}=3.8\mathrm{}$, which permits a conventional electron-phonon interpretation of the high $T_c$. The Hall coefficients are qualitatively explained, including sign discrepancies in published measurements.