Vetenskap & teknik
Pocket
Ordering Phenomena in Rare-Earth Nickelate Heterostructures
Matthias Hepting
1469:-
Uppskattad leveranstid 11-22 arbetsdagar
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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.
- Format: Pocket/Paperback
- ISBN: 9783319868806
- Språk: Engelska
- Antal sidor: 147
- Utgivningsdatum: 2018-08-02
- Förlag: Springer International Publishing AG