上海科技大学知识管理系统

Correlated bilayer systems, as the building block of various transition metal compounds, manifest by the intrinsic competition of the interlayer and intralayer couplings mediated by the strong Coulomb interactions, which leads to many intriguing phenomena. Employing dynamical mean-field theory, we conduct a comprehensive investigation of the bilayer Hubbard model on a Kagome lattice. By combining several different estimators, including the double occupancy Docc , −βG (β/2), the local Green’s function ImG loc (iωn ), the local self-energy ImΣloc (iωn), the dimer Green’s function ImGd (iωn), and the dimer self-energy ImΣd (iωn ), we classify different phases and their transitions. In addition to the anticipated Mott state at large U/t and small t'/t, and the correlated band insulating state at small U/t but large t'/t, we identify an emergent phase in which electrons lose long-range transport capability but maintain mobility between the two layers. The bilayer Kagome Hubbard model, along with its rich phase diagram, offers valuable insights into many material compounds. Our theoretical engineering of the Mott states.