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Spin-valley collective modes of the electron liquid in graphene | | Zachary M. Raines
; Vladimir I. Fal'ko
; Leonid I. Glazman
; | | Date: |
28 Oct 2020 | | Abstract: | 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. | | Source: | arXiv, 2010.15154 | | Services: | Forum | Review | PDF | Favorites | |
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