Charge properties of cuprates: ground state and excitations

Abstract

This thesis investigates charge properties of undoped cuprate compounds. We develop a new analytical approach to the approximation of ground-state charge properties and apply it to the geometries found in the cuprates. With the additional help of numerical methods (Projector Quantum Monte Carlo) we analyze the influence of the dimensionality on the ground state properties. A further topic are charge excitations, especially Cu 2p_3_/_2 core-level X-ray photoemission spectroscopy (XPS). Low dimensional systems are treated with exactly solvable models, which allow a good description of experimental data. For systems of higher dimensionality an approximation scheme using projection technique is presented. The results are compared to several experimental spectra.SIGLEAvailable from: http://hsss.slub-dresden.de/pub2/disseration/2001/mathematik / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman