Spin-valley collective modes of the electron liquid in graphene
ORAL
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 at finite and zero temperature. In addition to the SU(2) symmetric spin mode, these include also the valley imbalance modes obeying a U(1) symmetry, and an SU(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.
–
Presenters
-
Zachary Raines
Yale University
Authors
-
Zachary Raines
Yale University
-
Vladimir Falko
National Graphene Institute, Henry Royce Institute for Advanced Materials, Department of Physics and Astronomy, University of Manchester, National Graphene Institute, Univ of Manchester, School of Physics and Astronomy, University of Manchester, Manchester University, Department of Physics and Astronomy, University of Manchester, National Graphene Institute, University of Manchester, University of Manchester, Physics and Astronomy, National Graphene Institute, the University of Manchester, UK
-
Leonid Glazman
Yale University, Departments of Applied Physics and Physics, Yale University