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http://dx.doi.org/10.18419/opus-12257
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DC Element | Wert | Sprache |
---|---|---|
dc.contributor.advisor | Keimer, Bernhard (Prof. Dr.) | - |
dc.contributor.author | Trepka, Heiko | - |
dc.date.accessioned | 2022-07-27T12:51:27Z | - |
dc.date.available | 2022-07-27T12:51:27Z | - |
dc.date.issued | 2022 | de |
dc.identifier.other | 1811830188 | - |
dc.identifier.uri | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-122749 | de |
dc.identifier.uri | http://elib.uni-stuttgart.de/handle/11682/12274 | - |
dc.identifier.uri | http://dx.doi.org/10.18419/opus-12257 | - |
dc.description.abstract | In this work, we use high-resolution neutron Triple-Axis and Spin-echo spectroscopy to study the critical properties of the strongly electron-correlated 4d square-lattice antiferromagnets Ca2RuO4 and Ca3Ru2O7, as well as of the heavy-fermion system CeCu5.8Au0.2 in vicinity and above the Néel-temperatures TN. We extract static and dynamical critical exponents to determine the spin dimensionalities and relevant anisotropies. We find that the critical behaviors of the single-layer compound Ca2RuO4 follow universal scaling laws that are compatible with predictions of the 2D-XY model. The bilayer compound Ca3Ru2O7 is only partly consistent with the 2D-XY theory and best described by the 3D-Ising model, which is likely a consequence of the intra-bilayer exchange interactions in combination with an orthorhombic single-ion anisotropy. For CeCu5.8Au0.2 we find signatures of a quantum-to-classical crossover in the dynamic scaling behavior. | en |
dc.language.iso | en | de |
dc.rights | info:eu-repo/semantics/openAccess | de |
dc.subject.ddc | 500 | de |
dc.title | Critical magnetic fluctuations in strongly electron-correlated systems | en |
dc.title.alternative | Kritische magnetische Fluktuationen in stark korrelierten Elektronensystemen | de |
dc.type | doctoralThesis | de |
ubs.dateAccepted | 2022-06-27 | - |
ubs.fakultaet | Externe wissenschaftliche Einrichtungen | de |
ubs.institut | Max-Planck-Institut für Festkörperforschung | de |
ubs.publikation.seiten | III, 195 | de |
ubs.publikation.typ | Dissertation | de |
ubs.thesis.grantor | Mathematik und Physik | de |
Enthalten in den Sammlungen: | 08 Fakultät Mathematik und Physik |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
---|---|---|---|---|
PHD_thesis_HeikoTrepka.pdf | 30,55 MB | Adobe PDF | Öffnen/Anzeigen |
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