Spin waves in doped graphene: a time-dependent spin-density-functional approach to collective excitations in paramagnetic two-dimensional Dirac fermion gases
arXiv:2110.00045 · doi:10.1103/PhysRevB.104.245422
Abstract
In spin-polarized itinerant electron systems, collective spin-wave modes arise from dynamical exchange and correlation (xc) effects. We here consider spin waves in doped paramagnetic graphene with adjustable Zeeman-type band splitting. The spin waves are described using time-dependent spin-density-functional response theory, treating dynamical xc effects within the Slater and Singwi-Tosi-Land-Sjolander approximations. We obtain spin-wave dispersions and spin stiffnesses as a function of doping and spin polarization, and discuss prospects for their experimental observation.
14 pages, 8 figures
References in corpus (20)
- The electronic properties of graphene
- Graphene plasmonics
- Dielectric function, screening, and plasmons in 2D graphene
- Dynamical polarization of graphene at finite doping
- Proximity-induced ferromagnetism in graphene revealed by anomalous Hall effect
- Intrinsic Terahertz Plasmons and Magnetoplasmons in Large Scale Monolayer Graphene
- Drude weight, plasmon dispersion, and a.c. conductivity in doped graphene sheets
- Interaction corrections to the polarization function of graphene
- In-plane critical magnetic fields in magic-angle twisted trilayer graphene
- Collective modes in two- and three-dimensional electron systems with Rashba spin-orbit coupling
- Dynamical polarization of monolayer graphene in a magnetic field
- Chiral Spin Mode on the Surface of a Topological Insulator
- Identification of superconducting pairing symmetry in twisted bilayer graphene using in-plane magnetic field and strain
- Spin-flip excitations, spin waves, and magneto-excitons in graphene Landau levels at integer filling factors
- Spin polarized two-dimensional electron gas embedded in semimagnetic quantum well : ground state, spin responses, spin excitations, Raman spectrum
- Plasmons in spin polarized graphene: a new way to measure spin polarization
- Induced exchange and spin-orbit effects by proximity in graphene on Ni and Co
- Parameter-free density functional for the correlation energy in two dimensions
- Three- to two-dimensional crossover in time-dependent density-functional theory
- Spin-valley Silin modes in graphene with substrate-induced spin-orbit coupling