标题： 自旋轨道耦合驱动的反铁磁体中自旋波的手性翻转 显示英文标题

标题： Spin-Orbit Coupling-Driven Chirality Switching of Spin Waves in Altermagnets

摘要： 自旋波的手性为数据传输和处理提供了一种有利的二进制载体，具有超快动力学和低功耗的特点。 反铁磁体具有内在的手性分裂自旋波和零净磁化，因此成为承载手性比特的理想平台。 然而，在基于手性的电路中实现逻辑操作，对主动控制手性状态仍是一个关键挑战。 在这里，我们提出了一种新方案，通过调节自旋轨道耦合（SOC）强度，在反铁磁体中可逆地切换自旋波的手性，使其在右旋和左旋之间转换。 具体而言，对于面内自旋极化，SOC与反铁磁性发生混合，这会引起动量依赖的竞争。 自旋波的手性分裂结构在不同的布里渊区区域由SOC或反铁磁性主导，通过改变它们的相对强度可以实现手性切换。 提出了一种实验设计，利用反铁磁基底来诱导SOC，并使用重金属条带进行手性检测。 我们的工作通过SOC在反铁磁体中控制自旋波手性建立了一种新途径，为开发利用可切换手性自旋波作为动态信息载体的自旋电子器件奠定了基础。 显示英文摘要

摘要： Chirality of spin waves offers an advantageous binary carrier for data transmission and processing with ultrafast dynamics and low power consumption. Altermagnets possess intrinsic chirality-splitting spin waves and vanishing net magnetization, thus emerging as ideal platforms to host chirality bits. However, active control of the chiral states remains a key challenge for realizing logic operations in chirality-based circuits. Here, we propose a novel scheme for reversibly switching spin-wave chirality in altermagnets between right- and left-handedness by tuning spin-orbit coupling (SOC) strength. Specifically, for in-plane spin polarization, SOC hybridizes with the altermagnetism, which induces a momentum-dependent competition. The chirality-splitting structure of spin waves is dominated by either SOC or altermagnetism in different Brillouin zone regions, allowing chirality switching by altering their relative strength. An experimental design utilizing an antiferromagnetic substrate to induce SOC and a heavy-metal stripe for chirality detection is proposed. Our work establishes a novel pathway for controlling spin-wave chirality in altermagnets via SOC, laying the groundwork for developing spintronic devices utilizing switchable chiral spin waves as dynamic information carriers.