Convergence of the Lawrence--Doniach Energy for Layered Superconductors with Magnetic Fields Near $H_c_1$

Abstract

We analyze the Lawrence--Doniach model for three-dimensional highly anisotropic superconductors with layered structure. For such a superconductor occupying a bounded generalized cylinder in $\mathbb{R}^3$ with equally spaced parallel layers, we assume an applied magnetic field that is perpendicular to the layers with intensity $h_{ex}\sim|\ln\epsilon|$ as $\epsilon\rightarrow 0$, where $\epsilon$ is the reciprocal of the Ginzburg--Landau parameter. We prove Gamma-convergence of the Lawrence--Doniach energy as $\epsilon$ and the interlayer distance $s$ tend to zero, under the additional assumption that the layers are weakly coupled (i.e., $s\gg\epsilon$).