织构一维Rashba铁磁体的手征阻尼、手征旋磁和电流感生转矩
Chiral damping, chiral gyromagnetism and current-induced torques in textured one-dimensional Rashba ferromagnets
摘要：
本文研究了具有非共线磁交换场的一维Rashba模型中的吉尔伯特阻尼、光谱旋磁比和电流感生转矩。我们发现由于空间反转不对称性和自旋轨道相互作用（SOI）的结合，左手和右手Néel型磁畴壁的Gilbert阻尼不同，这与最近的手征阻尼实验观察一致.此外，我们发现，也光谱$g$因子不同的左手和右手Néel型畴壁，我们称之为手征旋磁。我们还研究了旋磁比在Rashba模型与共线磁化，在那里我们发现，散射修正的$g$因素消失为零SOI，成为重要的有限自旋轨道耦合，并趋于稳定的旋磁比接近其非相对论值。
英文摘要：
We investigate Gilbert damping, spectroscopic gyromagnetic ratio and current-induced torques in the one-dimensional Rashba model with an additional noncollinear magnetic exchange field. We find that the Gilbert damping differs between left-handed and right-handed Néel-type magnetic domain walls due to the combination of spatial inversion asymmetry and spin-orbit interaction (SOI), consistent with recent experimental observations of chiral damping. Additionally, we find that also the spectroscopic $g$ factor differs between left-handed and right-handed Néel-type domain walls, which we call chiral gyromagnetism. We also investigate the gyromagnetic ratio in the Rashba model with collinear magnetization, where we find that scattering corrections to the $g$ factor vanish for zero SOI, become important for finite spin-orbit coupling, and tend to stabilize the gyromagnetic ratio close to its nonrelativistic value.
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