Metal-Insulator Transitions and Realistic Modelling of Correlated Electron Systems

Abstract

The calculation of physical properties of electronic systems by controlled approximations is one of the most important challenges of modern theoretical solid state physics. In particular, the physics of transition metal oxides — a singularly important group of materials both from the point of view of fundamental research and technological applications — may only be understood by explicit consideration of the strong effective interaction between the conduction electrons in these systems. The investigation of electronic many-particle systems is made especially complicated by quantum statistics, and by the fact that the phenomena of interest (e.g., metal insulator transitions and fer-romagnetism) usually require the application of non-perturbative theoretical techniques.KeywordsLocal Density ApproximationAuxiliary FieldCorrelate Electron SystemLocal Density Approximation CalculationAnderson Impurity ModelThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.