Spin and orbital Edelstein effect in a bilayer system with Rashba interaction

Abstract

The spin Edelstein effect has proven to be a promising phenomenon to generate spin polarization from a charge current in systems without inversion symmetry. In recent years, a current-induced orbital magnetization, called orbital Edelstein effect, has been predicted for various systems with broken inversion symmetry, using the atom-centered approximation and the modern theory of orbital magnetization. In this work, we study the current-induced spin and orbital magnetization for a bilayer system with Rashba interaction, using the modern theory of orbital magnetization and Boltzmann transport theory in relaxation-time approximation. We found that the orbital effect can be significantly larger than the spin effect, depending on the model parameters. Furthermore, the Edelstein response can be enhanced, suppressed, and even reversed, depending on the relation of the effective Rashba parameters of each layer. A sign change of the orbital polarization is related to an interchange of the corresponding layer localization of the states.

Marie Skłodowska-Curie Actions, H2020-MSCA-ITN-2020; Project acronym SPEAR; Grant Agreement No. 955671 - Revised introduction. - Change unit scale of effective parameters. - Add Appendix A and B. - Correct typos

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• Out-of-plane Edelstein effects: Electric-field induced magnetization in $p$-wave magnets
• Controlling the orbital Hall effect in gapped bilayer graphene in the terahertz regime
• Chirality-induced orbital Edelstein effect in an analytically solvable model
• Orbital Edelstein effect of electronic itinerant orbital motion at edges
• Charge-Spin Conversion in Two-Subband Quantum Wells with Conventional and Unconventional Rashba Spin-Orbit Coupling
• Current-induced spin polarisation in Rashba-Dresselhaus systems under different point groups
• Edelstein Effect in Isotropic and Anisotropic Rashba Models
• Current-induced spin and orbital polarization in the ferroelectric Rashba semiconductor GeTe
• Non-relativistic linear Edelstein effect in helical EuIn2As2
• Boltzmann theory of the inverse Edelstein effect in a two-dimensional Rashba gas
• Interface controlled Berry phase and anisotropic spin-charge conversion in altermagnet-topological insulator bilayers
• Superconducting magnetoelectric effects in mesoscopic hybrid structures