发表机构
Beijing Institute of Mathematical Sciences and Applications; Max Planck Institute for the Chemical Physics of Solids（北京数学与交叉科学研究中心; 马克斯·普朗克固体化学物理研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文通过将动力学自能纳入杂质散射，发现QPI谱在磁子发射阈值处存在特征交叉，证明傅里叶变换隧穿谱可区分静态磁序与自旋波重整化。
AI 中文摘要
我们研究了局域-巡游反铁磁体中的动量分辨准粒子干涉（QPI），其中有序的局域磁矩与传导电子通过交换耦合相互作用。静态反铁磁序重构了电子能带，而单磁子过程进一步通过动量依赖和频率依赖的自能对准粒子进行修饰。将这种动力学重整化直接纳入玻恩杂质散射中，我们发现了QPI谱中的一个特征性交叉。在较低磁子发射阈值以下，修正主要表现为色散性的，由自能的实部主导；而在此能量尺度以上，其虚部则导致散射强度的显著展宽和重新分布。动力学响应持续到高于磁子上限能量，并且对于粒子-空穴不对称的能带，在隧穿偏压上表现出强烈的不对称性。这些结果表明，傅里叶变换隧穿谱学能够区分静态磁重构与动力学自旋波重整化。
英文摘要
We investigate momentum-resolved quasiparticle interference (QPI) in a localized-itinerant antiferromagnet, where ordered local moments are exchange coupled to conduction electrons. Static antiferromagnetic order reconstructs the electronic bands, while one-magnon processes further dress the quasiparticles through a momentum- and frequency-dependent self-energy. Incorporating this dynamical renormalization directly into the Born impurity scattering, we find a characteristic crossover in the QPI spectrum. Below the lower magnon-emission edge, the modification is predominantly dispersive and governed by the real part of the self-energy, whereas above this scale its imaginary part produces pronounced broadening and redistribution of the scattering intensity. The dynamical response persists beyond the upper magnon energy and is strongly asymmetric in tunneling bias for a particle--hole-asymmetric band. These results show that Fourier-transform tunneling spectroscopy can distinguish static magnetic reconstruction from dynamical spin-wave renormalization.
