Reduction of g-factor due to Rashba effect in graphene
arXiv:2010.10815 · doi:10.1063/5.0057559
Abstract
Graphene is a highly promising material in the field of spin electronics. Recent experiments on electron spin resonance have observed a reduction in the g-factor of graphene. In our previous paper [J. Phys. Soc. Jpn. 88, 094707 (2019)], we demonstrated that one of sources for this reduction is the diamagnetic property of graphene. However, the diamagnetic property by itself does not fully account for the magnitude of the reduction observed in the experiments. In this paper, we focus on the Rashba effect, which is caused by the work function existing near the surface of graphene. The Rashba effect tilts the spin magnetic moment to the in-plane direction of the graphene sheet, potentially reducing the g-factor. We evaluate this reduction using a simple model system incorporating the Rashba and spin Zeeman effects. We then demonstrate that the resultant g-factor is in close agreement with that observed in the prior experiments, indicating that the Rashba effect is able to account for the remaining reduction in the g-factor of graphene.
24 pages, 2 figure, 2 tables
References in corpus (10)
- Electric Field Effect in Atomically Thin Carbon Films
- The electronic properties of bilayer graphene
- Intrinsic and Rashba Spin-orbit Interactions in Graphene Sheets
- Limits on intrinsic magnetism in graphene
- Anomalous Orbital Magnetism and Hall Effect of Massless Fermions in Two Dimension
- Diamagnetism in disordered graphene
- Orbital magnetism of coupled bands models
- Observation of Resistively Detected Hole Spin Resonance and Zero-field Pseudo-spin Splitting in Epitaxial Graphene
- Growth Structure and Work Function of Bilayer Graphene on Pd(111)
- Extended Hartree-Fock method based on pair density functional theory