论文标题
磁空诱导的弗里德尔振荡：从散射特性到全电检测
Friedel oscillations induced by magnetic skyrmions: from scattering properties to all-electrical detection
论文作者
论文摘要
磁性天空是可以在信息技术中起主要作用的自旋旋转孤子缺陷。他们在应用和设备中的未来取决于其有效的操纵和检测。在这里，我们从Ab-Initio探索它们的性质，作为原本不受干扰的磁性材料，薄薄的PD膜覆盖的Fe层，并沉积在IR（111）表面的顶部。天空的存在触发了散射过程，从中出现了弗里德尔振荡。后者介导了天空之间的相互作用，或者在天空和其他潜在的缺陷之间进行了介导。与它们的波长相反，振荡的幅度在很大程度上取决于天空的大小。与散射原子缺陷的类比可以使有效的散射电位和向天空颗粒的相位转移，这对于基于简单的散射框架可以预测其行为很有用。诱导的电荷纹波可用于对位于表面上的天空的非侵入性全电气检测，或者即使埋在距检测电极的几纳米范围内。
Magnetic skyrmions are spin swirling solitonic defects that can play a major role in information technology. Their future in applications and devices hinges on their efficient manipulation and detection. Here, we explore from ab-initio their nature as magnetic inhomongeities in an otherwise unperturbed magnetic material, Fe layer covered by a thin Pd film and deposited on top of Ir(111) surface. The presence of skyrmions triggers scattering processes, from which Friedel oscillations emerge. The latter mediate interactions among skyrmions or between skyrmions and other potential surrounding defects. In contrast to their wavelengths, the amplitude of the oscillations depends strongly on the size of the skyrmion. The analogy with the scattering-off atomic defects enables the assignment of an effective scattering potential and a phase shift to the skyrmionic particles, which can be useful to predict their behavior on the basis of simple scattering frameworks. The induced charge ripples can be utilized for a noninvasive all-electrical detection of skyrmions located on a surface or even if buried a few nanometers away from the detecting electrode.
