We present the first rigorous examples of non-singular Hubbard models which exhibit ferromagnetism at zero temperature. The models are defined in arbitrary dimensions, and are characterized by finite-ranged hoppings, dispersive bands, and finite on-site Coulomb interaction U . The picture, which goes back to Heisenberg, that sufficiently large Coulomb interaction can revert Pauli paramagnetism ...

To electrically control magnetic properties of material is promising toward spintronic applications, where the investigation carrier doping effects on antiferromagnetic (AFM) materials remains challenging due to their zero net magnetization. In this work, authors find electron dependent variation orders a 2D AFM insulator NiPS3, concentration tuned by intercalating various organic cations into ...