Stability of Interchain Coupled Organic Ferromagnets with Non-Nearest Neighbor Hopping Interactions

Abstract

Based on a theoretical model proposed for interchain coupled quasi‐one‐dimensional organic ferromagnets, the stability of the high‐spin ground state of the system is studied. The non‐nearest neighbor hopping interactions as well as the electron–phonon and electron–electron interaction are taken into account. It is shown that when the second‐nearest neighbor hopping interaction increases, the energy gap decreases, which destablizes the ferromagnetic ground state while the third‐nearest neighbor hopping interaction makes it stable.