Electronic Structure Investigation of Novel Superconductors
Please use this identifier to cite or link to this item:
https://osnadocs.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2014081412717
https://osnadocs.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2014081412717
| Title: | Electronic Structure Investigation of Novel Superconductors |
| Other Titles: | Elektronische Struktur neuartiger Supraleiter |
| Authors: | Buling, Anna |
| Thesis advisor: | Prof. Dr. Manfred Neumann |
| Thesis referee: | Prof. Dr. Joachim Wollschläger |
| Abstract: | The discovery of superconductivity in iron-based pnictides in 2008 gave rise to a high advance in the research of high-temperature superconductors. But up to now there is no generally admitted theory of the non-BCS mechanism of these superconductors. The electron and hole doped Ba122 (BaFe2As2) compounds investigated in this thesis are supposed to be suitable model systems for studying the electronic behavior in order to shed light on the superconducting mechanisms. The 3d-transiton metal doped Ba122 compounds are investigated using the X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), X-ray emission spectroscopy (XES) and X-ray magnetic circular dichroism (XMCD), while the completely hole doped K122 is observed using XPS. The experimental measurements are complemented by theoretical calculations. A further new class of superconductors is represented by the electride 12CaO*7Al2O3: Here superconductivity can be realized by electrons accommodated in the crystallographic sub-nanometer-sized cavities, while the mother compound is a wide band gap insulator. Electronic structure investigations, represented by XPS, XAS and resonant X-ray photoelectron spectroscopy (ResPES), carried out in this work, should help to illuminate this unconventional superconductivity and resolve a debate of competing models for explaining the existence of superconductivity in this compound. |
| URL: | https://osnadocs.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2014081412717 |
| Subject Keywords: | Superconductors; Supraleiter; X-Ray Spectroscopy; Röntgenspektroskopie; Pnictides; Pnictide |
| Issue Date: | 14-Aug-2014 |
| Type of publication: | Dissertation oder Habilitation [doctoralThesis] |
| Appears in Collections: | FB06 - E-Dissertationen |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| thesis_buling.pdf | Präsentationsformat | 10,9 MB | Adobe PDF | thesis_buling.pdf  View/Open |
Items in osnaDocs repository are protected by copyright, with all rights reserved, unless otherwise indicated.
rightsstatements.org
