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  • Letter

Spin-valley Silin modes in graphene with substrate-induced spin-orbit coupling

Zachary M. Raines1, Dmitrii L. Maslov2, and Leonid I. Glazman1

  • 1Department of Physics, Yale University, New Haven, Connecticut 06520, USA
  • 2Department of Physics, University of Florida, Gainesville, Florida 32611, USA

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Phys. Rev. B 105, L201201 – Published 2 May, 2022

DOI: https://doi.org/10.1103/PhysRevB.105.L201201

Abstract

In the presence of an external magnetic field the Fermi-liquid state supports oscillatory spin modes known as Silin modes. We predict the existence of the generalized Silin modes in a multivalley system, monolayer graphene. A gauge- and Berry-gauge-invariant kinetic equation for a multivalley Fermi liquid is developed and applied to the case of graphene with extrinsic spin-orbit coupling (SOC). The interplay of SOC and Berry curvature allows for the excitation of generalized Silin modes in the spin and valley-staggered-spin channels via an AC electric field. The resonant contributions from these modes to the optical conductivity are calculated.

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Phys. Rev. B 105, L201201– Published 2 May, 2022
  • Received 16 July 2021
  • Revised 18 April 2022
  • Accepted 19 April 2022
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