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.

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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