论文标题
2D超导体中状态波动的局部密度作为量子扩散的探针
Local density of state fluctuations in 2D superconductor as a probe of quantum diffusion
论文作者
论文摘要
超导和混乱的相互作用产生了许多复杂的现象。特别是，预计扩散电子波函数的特殊结构将在某些疾病范围内增加临界温度。在这项工作中，我们使用铅的外延单层，显示简单的带结构和同质结构障碍作为弱抗静脉化制度中2D超导体的模型系统。然后，我们对该材料中局部密度（LDOS）和光谱能隙的新兴波动进行了广泛的研究，并将它们与有吸引力的Hubbard模型的分析结果和数值解决方案进行了比较。我们表明，介观LDOS波动允许局部探测弹性和非弹性散射速率，众所周知，在运输测量中很难测量。
The interplay of superconductivity and disorder generates a wealth of complex phenomena. In particular, the peculiar structure of diffusive electronic wavefunctions is predicted to increase the superconducting critical temperature in some range of disorder. In this work, we use an epitaxial monolayer of lead showing a simple band structure and homogenous structural disorder as a model system of a 2D superconductor in the weak-antilocalization regime. Then, we perform an extensive study of the emergent fluctuations of local density of states (LDOS) and spectral energy gap in this material and compare them with both analytical results and numerical solution of the attractive Hubbard model. We show that mesoscopic LDOS fluctuations allow to probe locally both the elastic and inelastic scattering rates which are notoriously difficult to measure in transport measurements.
