Energy Gap of Superconducting Tin Films in a Magnetic Field

Abstract
We have observed the behavior of clean superconducting thin films of tin in both parallel and perpendicular magnetic fields. The results are quantitatively consistent with an interpretation based on the Ginzburg-Landau theory. For the parallel field we have generated one-dimensional numerical solutions of their equations, while for the perpendicular field we have used a refinement of a vortex model proposed by Tinkham which is based on their expression for free energy.