论文标题
抗铁磁铁中的全磁性船尾gerlach效应
All-magnonic Stern-Gerlach effect in antiferromagnets
论文作者
论文摘要
船尾gerlach（SG）效应众所周知是通过磁场梯度携带磁矩的原子束的自旋依赖性分裂，从而导致电子自旋的概念。抗铁磁铁可以容纳两个具有相反自旋偏振的磁化模式，这等同于电子的自旋特性。在这里，我们提出了在抗磁磁性磁通系统中存在全磁性SG效应的存在，其中线性极化的自旋波束由直dzyaloshinskii-moriya相互作用（DMI）界面偏转到两个相反的极性旋转波束，在两个离散方向传播。此外，我们观察到由弯曲的DMI界面诱导的抗磁性自旋波的双重焦点，该弯曲的DMI界面也可以在空间上分离具有相反极化的热镁。我们的发现提供了一种独特的观点，可以理解与抗铁磁磁蛋白自旋相关的丰富现象，并且有助于依赖于极化的抗磁性自旋装置。
The Stern-Gerlach (SG) effect is well known as the spin-dependent splitting of a beam of atoms carrying magnetic moments by a magnetic-field gradient, leading to the concept of electron spin. Antiferromagnets can accommodate two magnon modes with opposite spin polarizations, which is equivalent to the spin property of electrons. Here, we propose the existence of an all-magnonic SG effect in antiferromagnetic magnonic system, where a linearly polarized spin-wave beam is deflected by a straight Dzyaloshinskii-Moriya interaction (DMI) interface into two opposite polarized spin-wave beams propagating in two discrete directions. Moreover, we observe bi-focusing of antiferromagnetic spin waves induced by a curved DMI interface, which can also spatially separate thermal magnons with opposite polarizations. Our findings provide a unique perspective to understand the rich phenomena associated with antiferromagnetic magnon spin and would be helpful for polarization-dependent application of antiferromagnetic spintronic devices.
