摘要： Based on the scaling rule: R(T, H, θ) = R(T, h), where h = H(sin²θ+cos²θ/γ²)^1/2 and θ 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 γ 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.

Abstract: Based on the scaling rule: R(T, H, $\theta$) = R(T, h), where h = H(sin²$\theta$+cos²$\theta$/$\gamma$²)^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.

中图分类号: 

• 74.25.Fy

74.25.Op (Mixed states, critical fields, and surface sheaths) 74.62.-c (Transition temperature variations, phase diagrams)