标题： 二维费米液体中自旋轨道耦合的集体自旋模态的内在阻尼 显示英文标题

标题： Intrinsic Damping of Collective Spin Modes in a Two-Dimensional Fermi Liquid with Spin-Orbit Coupling

摘要： 具有自旋-轨道耦合（SOC）的费米液体预计能够支持一种新的集体激发模式：在没有磁场的情况下磁化强度的振荡。我们表明，即使在无限长波长（q = 0）的极限下，这些模式也会由于电子-电子相互作用而被阻尼。集体模式的线宽约为{\Delta }^2=E_F ，其中{\Delta }是一个特征自旋-轨道能级分裂，E_F 是费米能。这种阻尼与没有SOC时电荷和自旋集体模式已知的阻尼机制形成鲜明对比，所有这些机制在q = 0时都会消失，并且这是因为存在SOC时总自旋的各个分量都不守恒。 显示英文摘要

摘要： A Fermi liquid with spin-orbit coupling (SOC) is expected to support a new kind of collective modes: oscillations of magnetization in the absence of the magnetic field. We show that these modes are damped by the electron-electron interaction even in the limit of an infinitely long wavelength (q = 0). The linewidth of the collective mode is on the order of {\Delta}^2=E_F , where {\Delta} is a characteristic spin-orbit energy splitting and E_F is the Fermi energy. Such damping is in a stark contrast to known damping mechanisms of both charge and spin collective modes in the absence of SOC, all of which disappear at q = 0, and arises because none of the components of total spin is conserved in the presence of SOC.