Chemistry of Materials · 1998 · 96 citations · 65 references
Magnetic PropertiesCharge ExcitationsMagnetic InsulatorEngineeringCubic Boron NitrideNis2-xsex SystemStrongly Correlated Electron SystemsElectronic PropertiesSemiconductorsQuantum MaterialsMagnetic Topological InsulatorQuantum MatterMaterials ScienceSpin-charge-orbit ConversionPhysicsMetal−insulator TransitionCondensed Matter TheorySolid-state PhysicQuantum MagnetismNormal MetalsNatural SciencesCondensed Matter PhysicsApplied Physics
The NiS2-xSex system represents one of the best examples of a Mott−Hubbard system, i.e. a system in which, under appropriate conditions of concentration, temperature, or pressure, a metal−insulator transition driven by electron−electron interaction takes place. Here, the metallic phase is either antiferromagnetic (for 0.44 ≤ x ≤ 1) or paramagnetic (for x ≥1), whereas the insulating phase is as a rule antiferromagnetic (including the spin-canted phases). In this paper we review both the physical properties and outline the basic features of the theoretical approach to those correlated electron systems. Emphasis is placed on a qualitative understanding of the observed transformation of the system from semiconductor (or magnetic insulator) to metal.
65