We show, using a simple model, how ordinary disorder can gap an extended-$s$($A_{1g}$) symmetry superconducting state with nodes. The concommitantcrossover of thermodynamic properties, particularly the $T$-dependence of thesuperfluid density, from pure power law behavior to an activated one isexhibited. We discuss applications of this scenario to experiments on theferropnictide superconductors.
展开▼
机译：我们使用一个简单的模型展示了普通疾病如何使带有节点的扩展$ s $（$ A_ {1g} $）对称超导状态处于空白状态。展示了从纯幂定律行为到激活的热力学性质的伴随交叉，特别是超流体密度的$ T $-依赖性。我们讨论了这种情况在铁盐超导体实验中的应用。
展开▼
