ANISOTROPIC RESISTIVITY OF BI2SR2CUO(X) CRYSTALS

We report measurements of the anisotropic resistivity of Bi2Sr2CuOx Crystals using the Montgomery method. We find that the ab-plane resistivity is nearly linear with temperature down to 10 K, but deviates slightly from linearity below 40 K. The out-of-plane resistivity is metallic above 105 K, but nonmetallic below 105 K. The anisotropy ratio rho(c)/rho(ab) is temperature dependent and the maximum value is 9 X 10(4) at low temperature. We estimate the effective mass, the Fermi energy, and Fermi velocity, etc., using Kresin and Wolf s model. The plasma frequency and the transport electron-phonon coupling constant lambda(tr) are also calculated in a self-consistent way in combination with our resistivity and Hall coefficient data. We discuss the resistivity in the context of existing theories.