论文标题
一般，强大的杂质 - 强度依赖性的二粒干扰
General, Strong Impurity-Strength Dependence of Quasiparticle Interference
论文作者
论文摘要
与其他数量（例如状态的关节密度）相比，动量空间中的准粒子干扰（QPI）模式通常与杂质潜力的强度无关。在这里，使用$ t $ -matrix理论，我们表明，即使在最简单的情况下，即使是在平方晶格上使用$ s $ orbital的最简单情况下，每个站点的单位杂质也会完全分解。然后，我们从第一原理中预测，这是一种非常丰富的，杂质 - 强度依赖性的结构，该结构是TAA的QPI模式，TAA，一种原型Weyl半学。因此，这项研究表明，考虑散射杂质在内的细节（包括杂质强度）对于解释傅立叶变换扫描隧道光谱实验至关重要。
Quasiparticle interference (QPI) patterns in momentum space are often assumed to be independent of the strength of the impurity potential when compared with other quantities, such as the joint density of states. Here, using the $T$-matrix theory, we show that this assumption breaks down completely even in the simplest case of a single-site impurity on the square lattice with an $s$ orbital per site. Then, we predict from first-principles, a very rich, impurity-strength-dependent structure in the QPI pattern of TaAs, an archetype Weyl semimetal. This study thus demonstrates that the consideration of the details of the scattering impurity including the impurity strength is essential for interpreting Fourier-transform scanning tunneling spectroscopy experiments in general.
