Spin Dynamics from Niu-Kleinman Adiabatic Approach and Slave Boson Mean Field Theory
This work develops an adiabatic theory combining Niu-Kleinman equations with Kotliar-Ruckenstein slave-boson mean field theory to calculate spin wave dispersions in strongly correlated materials. The method is computationally efficient, capturing strong correlation effects beyond simple weak-coupling descriptions, and shows improved agreement with benchmark calculations like DQMC.