Quantification of the Rashba–Edelstein Effect in Twisted Bilayers

It is believed that the generation of Rashba Edelstein effect (REE) in bilayer systems composed of materials with strong spin‐orbit coupling is fundamentally governed by the breaking of spatial inversion symmetry (). This symmetry breaking is achieved through simple twisting operations, enabling the occurrence of REE. The REE has been extensively investigated, but the accurate quantitative calculations of this effect remain elusive. Herein, we developed an efficient program to calculate the magneto‐electric response tensors of REE. Using this program, the intensities of REE in bilayer 2H‐MoS₂ and 2H‐MoTe₂ at different twisting angles are calculated, and the magneto‐electric response tensors for 2H‐ and 1T phase MoS₂ at the same twisting angle are compared. Additionally, by comparing REE values of 2H‐MoS₂, 2H‐MoSe₂, and 2H‐MoTe₂ at the same twisting angle, the corresponding relationship between SOC and REE is discussed. It is further demonstrated that REE can be strengthened when more symmetries are broken by superimposing slipping before twisting. These calculations show the validity of our method for quantitatively calculating REE, providing a critical tool for studying physical properties mediated by REE.