Investigation of the magnetic phase diagram of the 2D ferrimagnetic J1-J2 model

The zero-temperature phase diagram and spin dynamics of the 2D ferrimagnetic $J_1-J_2$ model with $(S_1, S_2) = (1/2,1)$ are investigated using the time-dependent cluster mean-field theory (t-CMFT). The t-CMFT enables the investigation of the quantum-mechanical as well as semi-classical phase diagram and spin dynamics by control of the entanglement. For the characterization of the ferrimagnetic system, the magnetization, the energy per atom, the cluster quantum states and the von Neumann entropy have been determined.