- AutorIn
- Helge Rosner
- Titel
- Electronic structure and exchange integrals of low-dimensional cuprates
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:swb:14-991309339781-86545
- Datum der Einreichung
- 16.08.1999
- Datum der Verteidigung
- 12.10.1999
- Abstract (EN)
- The physics of cuprates is strongly influenced by the dimension of the cooper-oxygen network in the considered crystals. Due to the rich manifoldness of different network geometries realized by nature, cuprates are ideal model systems for experimental and theoretical studies of low-dimensional, strongly correlated systems. The dimensionality of the considered model compounds varies between zero and three with a focus on one- and two-dimensional compounds. Starting from LDA band structure calculations, the relevant orbitals for the low-energy physics have been characterized together with a discussion of the chemical bonding in the investigated compounds. By means of a systematic approach for various compounds, the influence of particular structural components on the electronic structure could be concluded. For the undoped cuprate compounds, paramagnetic LDA band structure calculations yield a metallic groundstate instead of the experimentally observed insulating behavoir. The strong correlations were taken into account using Hubbard- or Heisenberg-like models for the investigation of the magnetic couplings in cuprates. The necessary parameters were obtained from tight-binding parameterizations of LDA band structures. Finallly, several ARPES as well as XAS measurements were interpreted. The present work shows, that the combination of experiment, LDA, and model calculations is a powerful tool for the investigation of the electronic structure of strongly correlated systems.
- Freie Schlagwörter (DE)
- nicht angegeben
- Freie Schlagwörter (EN)
- Heisenberg model, Hubbard model, LDA, bandstructure, cuprates, exchange integrals, spectroscopy, spin 1/2 systems, tightbinding model
- Klassifikation (DDC)
- 29
- Klassifikation (RVK)
- UP 3600
- Normschlagwörter (GND)
- Cuprate, Elektronenstruktur, Hochtemperatursupraleiter, Niederdimensionales System, Photoelektronenspektroskopie, Röntenabsorptionsspektroskopie
- GutachterIn
- Prof. Dr. Helmut Eschrig
- Prof. Dr. W. E. Pickett
- Prof. Dr. Peter Fulde
- BetreuerIn
- Prof. Dr. Helmut Eschrig
- Verlag
- Technische Universität Dresden, Dresden
- URN Qucosa
- urn:nbn:de:swb:14-991309339781-86545
- Veröffentlichungsdatum Qucosa
- 19.09.1999
- Dokumenttyp
- Dissertation
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis