Collective spin oscillations in a magnetized graphene sheet
arXiv:2312.16782 · doi:10.1103/PhysRevB.109.224302
Abstract
We investigate collective spin excitations of graphene electrons with short-ranged interactions and subject to the external Zeeman magnetic field. We find that in addition to the familiar Silin spin wave, a collective spin-flip excitation that reduces to the uniform precession when the wave's momentum approaches zero, the magnetized graphene supports another collective mode visible in the transverse spin susceptibility: a collective spin-current mode. Unlike the Silin wave, this mode is not dictated by the spin-rotational symmetry but rather owns its existence to the pseudo-spin structure of the graphene lattice. We find the new collective excitation to become sharply defined in a finite interval of wave's momenta, the range of which is determined by the interaction and the magnetization.
arXiv comment15 pages, 7 figures
References in corpus (18)
- Strength of effective Coulomb interactions in graphene and graphite
- Spontaneous symmetry breakings in graphene subjected to in-plane magnetic field
- Linear response of doped graphene sheets to vector potentials
- f-Sum Rule and Unconventional Spectral Weight Transfer in Graphene
- Predicting a Gapless Spin-1 Neutral Collective Mode branch for Graphite
- Spectral function of the Heisenberg model on the triangular lattice
- Spontaneous spin ordering of Dirac spin liquid in a magnetic field
- Dynamical signatures of quasiparticle interactions in quantum spin chains
- Collective spinon spin wave in a magnetized U(1) spin liquid
- Magnetotransport in single layer graphene in a large parallel magnetic field
- Comment on "Gapless Spin-1 Neutral Collective Mode Branch for Graphite"
- Electron Spin Resonance of the Interacting Spinon Liquid
- Spin-valley collective modes of the electron liquid in graphene
- Dynamic response functions of two-dimensional Dirac fermions with screened Coulomb and short-range interactions
- Spin-valley Silin modes in graphene with substrate-induced spin-orbit coupling
- Hydrodynamics of interacting spinons in the magnetized spin- chain with the uniform Dzyaloshinskii-Moriya interaction
- Larmor precession in strongly correlated itinerant electron systems
- Spin waves in doped graphene: a time-dependent spin-density-functional approach to collective excitations in paramagnetic two-dimensional Dirac fermion gases