论文标题
声子在非磁性材料中引起的磁振荡
Magnetic oscillations induced by phonons in non-magnetic materials
论文作者
论文摘要
二十年前的一个意外发现表明，高贵金属表面中的冲击电子状态是自旋偏振的，形成了相互空间中的循环自旋纹理。随后，每当旋转轨道耦合以某种强度存在时，即使对于非磁系统，自旋程度的基本作用也被揭示出来。在这里，我们证明，与在旋转轨道耦合的情况下相似，传播振动模式也伴随着明确定义的磁振荡，即使在非磁性材料中也是如此。尽管考虑了WSE2二甲基化合物的单层，但该现象对于任何具有自旋轨道耦合的非磁性材料都是完全一般且有效的。新兴的声子诱导的磁振荡充当电子自旋的附加有效翻转机制及其在材料的传输和散射特性中的影响是显而易见的和深刻的。
An unexpected finding two decades ago demonstrated that Shockley electron states in noble metal surfaces are spin-polarized, forming a circulating spin texture in reciprocal space. The fundamental role played by the spin degree of freedom was then revealed, even for a non-magnetic system, whenever the spin-orbit coupling was present with some strength. Here we demonstrate that similarly to electrons in the presence of spin-orbit coupling, the propagating vibrational modes are also accompanied by a well-defined magnetic oscillation even in non-magnetic materials. Although this effect is illustrated by considering a single layer of the WSe2 dichalogenide, the phenomenon is completely general and valid for any non-magnetic material with spin-orbit coupling. The emerging phonon-induced magnetic oscillation acts as an additional effective flipping mechanism for the electron spin and its implications in the transport and scattering properties of the material are evident and profound.
