论文标题
传统超导体中线性吸收的弱定位校正
Weak localization correction to linear absorption in conventional superconductors
论文作者
论文摘要
对于无序的S波超导体研究了对线性吸收光谱的弱定位效果。顶点校正以与弱定位校正对单粒子光谱的方式合并到响应函数中。电子之间通过扩散运动增强的相互作用的影响对校正项做出了重大贡献。数值计算表明，弱定位效应抑制整个间隙的激发的吸收程度要比热激发抑制更大的程度，这与实验结果相似。在没有校正的情况下，线性吸收与顶点校正的比率显示出频率的较大变化，大约是超导间隙能量的两倍。这种行为代表了弱定位对线性吸收的关系与对单粒子光谱的关系。
The weak localization effect on a linear absorption spectrum is investigated for disordered s-wave superconductors. The vertex correction is incorporated into the response function in a way that is consistent with the weak localization correction to a one-particle spectrum. The effect of interactions between electrons enhanced by their diffusive motion makes a major contribution to the correction term. Numerical calculations show that the weak localization effect suppresses the absorption by the excitation across the gap to a greater extent than that by thermal excitation, which is a similar tendency to the results of experiments. The ratio of the linear absorption with vertex corrections to that without the corrections shows a large variation at the frequency that is around twice the energy of the superconducting gap. This behavior represents a relationship between the weak localization effect on the linear absorption and that on the one-particle spectrum.
