论文标题
在空间变化的倾斜铁磁系统中，自我聚焦的混合天空源
Self focusing Hybrid Skyrmions in spatially varying canted ferromagnetic systems
论文作者
论文摘要
磁性天空是磁性膜中的准颗粒构型，它可以充当携带超巨大，全电子非挥发性内存的位置的信息。天空可以由在重金属底层中驱动的电流旋转扭矩核定和驱动。沿着旋转路径，马格努斯力量会导致在边界上歼灭天空。通过将界面和散装的Dzyaloshinskii-Moriya相互作用（DMIS）结合在一起，例如，通过在具有高自旋轨道耦合的重金属层上使用B20材料，可以设计混合天空含量，该杂交天际含量将与Magnus Force平行于Racetrack平行于Racetrack。我们表明，通过使用空间变化的界面DMI，杂种Skyrmion将自动自动焦点沿路径沿路径的域角演变。此外，使用栅极驱动的电压控制的磁各向异性，我们可以控制杂种天空般的轨迹及其在赛道几何形状中的最终收敛路径和车道选择。
Magnetic skyrmions are quasiparticle configurations in a magnetic film that can act as information carrying bits for ultrasmall, all-electronic nonvolatile memory. The skyrmions can be nucleated and driven by spin-orbit torque from a current driven in a heavy metal underlayer. Along its gyrotropic path, a Magnus force can cause a skyrmion to be annihilated at the boundaries. By combining interfacial and bulk Dzyaloshinskii-Moriya interactions (DMIs), for instance by using a B20 material on top of a heavy metal layer with high spin-orbit coupling, it is possible to engineer a hybrid skyrmion that will travel parallel to the racetrack with zero Magnus force. We show that by using a spatially varying interfacial DMI, a hybrid skyrmion will automatically self-focus onto such a track as its domain angle evolves along the path. Furthermore, using a gate driven voltage controlled magnetic anisotropy, we can control the trajectory of the hybrid skyrmion and its eventual convergence path and lane selection in a racetrack geometry.
