Ordering Phenomena in Rare-Earth Nickelate Heterostructures / / by Matthias Hepting

• Record Nr.: UNINA9910254582303321
• Autore: Hepting Matthias
• Pubbl/distr/stampa: Cham : , : Springer International Publishing : , : Imprint : Springer, , 2017
• ISBN: 3-319-60531-3
• Edizione: [1st ed. 2017.]
• Descrizione fisica: 1 online resource (XVI, 147 p. 63 illus., 56 illus. in color.)
• Collana: Springer Theses, Recognizing Outstanding Ph.D. Research, , 2190-5053
• Disciplina: 621.38152
• Soggetti: Superconductivity; Superconductors; Spectroscopy; Microscopy; Surfaces (Physics); Interfaces (Physical sciences); Thin films; Materials science; Strongly Correlated Systems, Superconductivity; Spectroscopy and Microscopy; Surface and Interface Science, Thin Films; Characterization and Evaluation of Materials
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: "Doctoral Thesis accepted by University of Stuttgart, Germany."
• Nota di bibliografia: Includes bibliographical references at the end of each chapters.
• Nota di contenuto: Introduction: Transition Metal Oxides and their Heterostructures -- The Rare-earth Nickelates -- Experimental Techniques -- Tunable Order Parameters in Nickelate Heterostructures -- Complex Magnetic Order in Nickelate Slabs.
• Sommario/riassunto: This thesis presents an experimental study of ordering phenomena in rare-earth nickelate-based heterostructures by means of inelastic Raman light scattering and elastic resonant x-ray scattering (RXS). Further, it demonstrates that the amplitude ratio of magnetic moments at neighboring nickel sites can be accurately determined by RXS in ; combination with a correlated double cluster model, and controlled experimentally through structural pinning of the oxygen positions in the crystal lattice. The two key outcomes of the thesis are: (a) demonstratingfull control over the charge/bond and spin order parameters in specifically designed praseodymium nickelate heterostructures and observation of a novel spin density wave phase in absence of the charge/bond order parameter, which confirms theoretical predictions of a spin density wave phase driven by spatial confinement of the conduction electrons; and (b) assessing the thickness-induced crossover between collinear and non-collinear spin structures in neodymium nickelate slabs, which is correctly predicted by drawing on density functional theory. .