论文标题
通过从点磁铁的晶格散射过滤旋转
Filtering Spins by Scattering from a Lattice of Point Magnets
论文作者
论文摘要
自然创建具有两个自旋投影量子数的两个值的电子。在某些应用中，重要的是要从其余的一个自旋投影过滤电子。这种过滤不是很容易的，因为依赖自旋的相互作用通常很弱，并且不能导致任何实质性效果。在这里，我们提出了一个有效的自旋滤波器，基于二维晶体的散射，该晶体由对齐点磁体制成。即将发出的电子通量的极化由晶体控制，并以参数的特定值达到最大值。在我们的方案中，极化增加伴随着晶体的较高反射率。高透射是从两个晶体制成的量子腔中可行的。我们的发现可用于研究由磁原子制成的二维有序结构或对齐的手性分子的低能量自旋依赖性散射。
Nature creates electrons with two values of the spin projection quantum number. In certain applications, it is important to filter electrons with one spin projection from the rest. Such filtering is not trivial, since spin-dependent interactions are often weak, and cannot lead to any substantial effect. Here we propose an efficient spin filter based upon scattering from a two-dimensional crystal, which is made of aligned point magnets. The polarization of the outgoing electron flux is controlled by the crystal, and reaches maximum at specific values of the parameters. In our scheme, polarization increase is accompanied by higher reflectivity of the crystal. High transmission is feasible in scattering from a quantum cavity made of two crystals. Our findings can be used for studies of low-energy spin-dependent scattering from two-dimensional ordered structures made of magnetic atoms or aligned chiral molecules.
