TEMPERATURE-DEPENDENT ANISOTROPY IN La_1.86Sr_0.14CuO₄

Based on the scaling rule: R(T, H, \theta) = R(T, h), where h = H(sin²\theta+cos²\theta/\gamma²)^1/2 and \theta is field angle with respect to the ab-plane, the scaling approach is performed to examine the c-axis resistances of single crystalline La_1.86Sr_0.14CuO₄ as functions of field and its orientation at different temperatures. The anisotropy parameter \gamma of the system is extracted from the scaling approach, but shows an unusual temperature-dependent behavior, which is not expected by conventional theory. A phenomenological explanation of this temperature dependence is presented.