论文标题
通过空间调制应变控制自旋波
Control of spin waves by spatially modulated strain
论文作者
论文摘要
我们建议使用空间调制应变来控制大块磁铁内传播的自旋波。借助磁弹性，带有Wave Vector $ Q = 2K $的调制，将旋转波与$ K $和$ -K $接近的波向量混合。这导致了这些波的对称和反对称本征组合的脱位。由此产生的图片使人想起对称双孔电势中的隧道粒子之一。在这里，移动的旋转波受到$ 2K $ lattice调制后的经历，一段时间后将其传播方向变化到相反的方向，依此类推。该效果可用于控制自旋波传播，这对自旋和宏伟的应用可能有用。控制可能包括延迟线元件，过滤和自旋波的波导。
We suggest using spatially modulated strain for control of a spin wave propagating inside a bulk magnet. The modulation with the wave vector $q=2k$, by virtue of magnetoelasticity, mixes spin waves with wave vectors near $k$ and $-k$. This leads to lifting the degeneracy of the symmetric and antisymmetric eigenstate combinations of these waves. The resulting picture reminds one of a tunneling particle in a symmetric double-well potential. Here, a moving spin wave being subjected to the $2k$-lattice modulation after some time alters its propagation direction to the opposite one, and so on. The effect can be utilized for the control of the spin-wave propagation that can be useful for spintronic and magnonic applications. The control may include a delay line element, filtering, and waveguide of the spin waves.
