论文标题
破坏空间反转对称性以在具有不均匀磁交换的系统中获得不对称的自旋波激发
Breaking Space Inversion-Symmetry to Obtain Asymmetric Spin-Wave Excitation in Systems with Nonuniform Magnetic Exchange
论文作者
论文摘要
我们报告磁系统中不均匀交换的后果。旋转之间的量子机械交换相互作用是磁性现象的原因，通常认为在整个磁性系统之间是均匀的。部分灵感来自于dzyaloshinskii-moriya的相互作用（也称为反对称交换），我们使用沿磁条线性变化的交换相互作用作为空间反转对称性对称性的途径。我们发现，除了不对称模式和定位外，还可以使用空间变化的交换来设计非核心磁信号激发，以可调的频率。此外，我们的工作预测，非临时性会发生在多达数百GHz的广泛频率中。这种自旋波工程是在镁质和旋转技术领域正在进行研究的关键领域，这些领域有望实现下一代通信技术。预计在具有梯度特性的其他波系统中会发生类似的非年份。
We report on the consequences of non-uniform exchange in magnetic systems. The quantum mechanical exchange interaction between spins is responsible for the phenomenon of magnetic order, and is generally considered to be uniform across bulk magnetic systems. Partly inspired by the Dzyaloshinskii-Moriya interaction--also known as antisymmetric exchange--we use a linearly varying exchange interaction along a magnetic strip as a route to spatial inversion symmetry-breaking. We find that, in addition to asymmetric modes and localization, spatially-varying exchange can be used to design nonreciprocal magnetic signal excitation at frequencies that are tunable. Moreover, our work predicts nonreciprocity to occur across a vast range of frequencies up to hundreds of GHz. Such spin wave engineering is a key area of ongoing research in the fields of magnonics and spintronics, which are expected to enable the next generation of communication technology. Analogous nonreciprocity is expected to occur in other wave systems with gradient properties.
