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

Abstract

In the presence of 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.

arXiv comment5 pages, 1 figure; 9 pages supplementary

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Cited by in corpus (4)

• Collective spin modes in Fermi liquids with spin-orbit coupling
• Phonon-Induced Collective Modes in Spin-Orbit Coupled Polar Metals
• Spin waves in doped graphene: a time-dependent spin-density-functional approach to collective excitations in paramagnetic two-dimensional Dirac fermion gases
• Collective spin oscillations in a magnetized graphene sheet