Intrinsic Damping of Collective Spin Modes in a Two-Dimensional Fermi Liquid with Spin-Orbit Coupling

Abstract

A Fermi liquid with spin-orbit coupling (SOC) is expected to support a new kind of collective modes: oscillations of magnetization in the absence of the magnetic field. We show that these modes are damped by the electron-electron interaction even in the limit of an infinitely long wavelength (q = 0). The linewidth of the collective mode is on the order of Δ^2=E_F , where Δ is a characteristic spin-orbit energy splitting and E_F is the Fermi energy. Such damping is in a stark contrast to known damping mechanisms of both charge and spin collective modes in the absence of SOC, all of which disappear at q = 0, and arises because none of the components of total spin is conserved in the presence of SOC.

4+5pp, 4+1 figures

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Cited by in corpus (10)

• Chiral Spin Mode on the Surface of a Topological Insulator
• Collective spinon spin wave in a magnetized U(1) spin liquid
• Raman Scattering by a Two-Dimensional Fermi Liquid with Spin-Orbit Coupling
• Effective lattice model for collective modes in a Fermi liquid with spin-orbit coupling
• Collective spin modes in Fermi liquids with spin-orbit coupling
• Chirality and intrinsic dissipation of spin modes in two-dimensional electron liquids
• Spin waves in doped graphene: a time-dependent spin-density-functional approach to collective excitations in paramagnetic two-dimensional Dirac fermion gases
• Spin precession and spin waves in a chiral electron gas: beyond Larmor's theorem
• Resonant Edelstein and inverse-Edelstein effects, charge-to-spin conversion, and spin pumping from chiral-spin modes
• Electronic Raman scattering from 2D metals with broken inversion symmetry