Ordering Phenomena in Rare-Earth Nickelate Heterostructures
(Sprache: Englisch)
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...
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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) demonstrating full 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.
Inhaltsverzeichnis zu „Ordering Phenomena in Rare-Earth Nickelate Heterostructures “
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.
Bibliographische Angaben
- Autor: Matthias Hepting
- 2017, 1st ed. 2017, XVI, 147 Seiten, 56 farbige Abbildungen, Maße: 16 x 24,1 cm, Gebunden, Englisch
- Verlag: Springer, Berlin
- ISBN-10: 3319605305
- ISBN-13: 9783319605302
- Erscheinungsdatum: 07.07.2017
Sprache:
Englisch
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