发表机构
Fachbereich Physik, Universität Konstanz（康斯坦茨大学物理系）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文理论研究铁磁/反铁磁双层中的磁振子输运，通过自旋塞贝克效应发现反铁磁体中热触发自旋电流，为手性选择性自旋输运异质结构设计提供关键见解。
AI 中文摘要
信息处理的进展依赖于自旋电子学，其中磁态作为数据存储和传输的有效载体。在本工作中，我们从理论上研究了由铁磁体和反铁磁体组成的双层结构中的磁振子传播。为此，我们通过引入空间变化的温度分布来探测自旋塞贝克效应。这会产生局部磁振子激发以及从热区到冷区的连续磁振子通量，我们通过由此产生的非平衡磁振子积累来量化该通量。基于这些模式的手性，我们确定了磁振子模式从铁磁体进入反铁磁体或反之亦然传播的特定约束条件。一个关键发现是观察到反铁磁体中热触发的自旋电流，这种现象通常在遵守时间反演对称性的块体反铁磁体中不存在。这些结果为设计用于磁振子手性选择性自旋输运的异质结构提供了重要见解。
英文摘要
Progress in information processing relies on spintronics, where magnetic states serve as efficient carriers for data storage and transfer. In this work, we theoretically study magnon propagation in a bilayer composed of a ferro-magnet and an antiferromagnet. For this purpose, we probe the spin Seebeck effect by introducing a spatially varying temperature profile. This generates a local magnon excitation and a continuous magnon flux from hot to cold regions which we quantify through the resulting non-equilibrium magnon accumulation. Based on the chirality of these modes, we identify specific constraints for magnon modes traveling either from the ferromagnet into the antiferromagnet or vice versa. A key finding is the observation of a thermally triggered spin current in the antiferromagnet, a phenomenon typically absent in bulk antiferromagnets that obey time-reversal symmetry. These results provide important insights into the design of heterostructures for magnonic chirality-selective spin transport.
