论文标题
石墨烯中电子液体的自旋谷集体模式
Spin-valley collective modes of the electron liquid in graphene
论文作者
论文摘要
我们发展了原始石墨烯中电子液体支持的集体模式的理论。在关于电子电子相互作用的合理假设下，除了等离子体的所有模式都被过度抑制。除了$ su（2）$对称旋转模式外，其中还包括符合$ u（1）$对称的山谷不平衡模式，以及$ u（2）$ symmetric valley旋转旋转不平衡模式。我们得出表征过度抑制模式的相互作用和扩散常数。相应的放松率对石墨烯谷和旋转型应用程序设定了基本约束。
We develop the theory of collective modes supported by a Fermi liquid of electrons in pristine graphene. Under reasonable assumptions regarding the electron-electron interaction, all the modes but the plasmon are over-damped. In addition to the $SU(2)$ symmetric spin mode, these include also the valley imbalance modes obeying a $U(1)$ symmetry, and a $U(2)$ symmetric valley spin imbalance mode. We derive the interactions and diffusion constants characterizing the over-damped modes. The corresponding relaxation rates set fundamental constraints on graphene valley- and spintronics applications.
