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Autor(en): Ortiz, Roberto Antonio
Titel: Structural, electronic and magnetic properties of infinite-layer nickelate heterostructures and polycrystals
Erscheinungsdatum: 2022
Dokumentart: Dissertation
Seiten: xiv, 170
URI: http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-127094
http://elib.uni-stuttgart.de/handle/11682/12709
http://dx.doi.org/10.18419/opus-12690
Zusammenfassung: Materials composed of transition metal oxides possess various properties that arise from the correlated interplay between their elements. The interaction between the components of these materials results from the synergy involving the spin, charge, orbital, and structural degrees of freedom. Therefore, tuning and controlling these degrees of freedom by fabrication processes or external stimuli like temperature, pressure, or chemical doping becomes a central topic in current condensed matter research. Nowadays, modern technological developments and synthesis routes enable the combination of compounds to achieve modifications of one or more of their individual properties in the resultant composite. This procedure can also trigger different electronic, magnetic, and lattice correlations that allow the emergence of complex phases like multiferroicity, ferroelectricity, and spin glassiness and the observation of exciting quantum phenomena such as super- fluidity and unconventional superconductivity. In particular, an oxide heterostructure is a material created by depositing several layers of one or more compounds on top of a single crystal substrate, which is usually orders of magnitude larger in size. One particular region of interest is the interface between these oxides, where additional effects like spatial confinement, charge transfer, structural distortions, and exchange interactions play an essential role. However, the correct mixture of parameters used to achieve new fascinating phenomena requires a deep understanding of the complex physics that govern these systems individually. In addition to heterostructuting, another way to obtain new properties in as-grown materials is by altering their stoichiometry. This modification can be achieved by producing a chemical reaction ignited by a reactant compound. In the case of oxide materials, removing oxygen atoms leads to significant changes in the electronic and structural properties and the occurrence of phase transitions.
Enthalten in den Sammlungen:08 Fakultät Mathematik und Physik

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