AI 中文总结
该研究揭示手性阻尼可耦合反铁磁畴壁的平移与旋转模式，在无DMI时也能实现手性切换，还提出实验方案提取其贡献，为磁织构调控提供新参数。
AI 中文摘要
我们研究手性阻尼（CD）对反铁磁体（AFMs）中电流驱动的畴壁（DW）动力学的影响。亚晶格间的不对称CD会在DW质量张量中产生非对角分量，从而耦合平移和旋转模式。当通过Rashba自旋轨道相互作用（RSOI）由交流栅电压调制CD时，对称和不对称贡献分别诱导DW速度和倾斜角的振荡。微扰分析得到了振荡振幅的显式表达式，与数值模拟定量吻合。值得注意的是，即使不存在Dzyaloshinskii-Moriya相互作用（DMI），不对称CD也能实现奈尔型和布洛赫型DW之间的手性切换。最后，通过利用高驱动电流下DW宽度的相对论洛伦兹收缩，我们提出了一种实验可行的方案，以定性和定量提取CD的贡献。这些结果确立了反铁磁DW动力学中CD的清晰实验特征，并证明其作为磁织构调控参数的潜力。
英文摘要
We investigate the impact of chiral damping (CD) on current-driven domain-wall (DW) dynamics in antiferromagnets (AFMs). Asymmetric CD between sublattices generates off-diagonal components in the DW mass tensor, thereby coupling translational and rotational modes. When CD is modulated by an ac gate voltage via the Rashba spin-orbit interaction (RSOI), symmetric and asymmetric contributions induce oscillations in the DW velocity and tilt angle, respectively. A perturbative analysis yields explicit expressions for the oscillation amplitudes, in quantitative agreement with numerical simulations. Remarkably, even in the absence of Dzyaloshinskii-Moriya interaction (DMI), asymmetric CD enables chirality switching between Néel- and Bloch-type DWs. Finally, by exploiting the relativistic Lorentz contraction of the DW width at high driving currents, we propose an experimentally viable protocol to qualitatively and quantitatively extract the CD contribution. These results establish clear experimental signatures of CD in antiferromagnetic DW dynamics and demonstrate its potential as a control parameter for magnetic textures.
Comments13 pages, 3 figures
