Controlling collective electronic states in cuprates and nickelates : a resonant x-ray scattering study
著者
書誌事項
Controlling collective electronic states in cuprates and nickelates : a resonant x-ray scattering study
（Springer theses : recognizing outstanding Ph. D. research）
Springer, c2020
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注記
"Doctoral thesis accepted by the Technical University of Berlin, Germany"
Includes bibliographical references
収録内容
- Introduction.- Resonant X-Ray Scattering.- Introduction to Charge Order in the Cuprates.- Charge Order in (CaxLa1́x)(Ba1.75́xLa0.25+x)Cu3Oy Single Crystals.- Charge Order in YBa2Cu3O6+x Thin Flms.- Introduction to Antiferromagnetism in Ultrathin Nickel
内容説明・目次
内容説明
In this thesis chemical and epitaxial degrees of freedom are used to manipulate charge and spin ordering phenomena in two families of transition metal oxides, while taking advantage of state-of-the-art resonant x-ray scattering (RXS) methods to characterize their microscopic origin in a comprehensive manner. First, the relationship of charge density wave order to both magnetism and the "pseudogap" phenomenon is systematically examined as a function of charge-carrier doping and isovalent chemical substitution in single crystals of a copper oxide high-temperature superconductor. Then, in copper oxide thin films, an unusual three-dimensionally long-range-ordered charge density wave state is discovered, which persists to much higher temperatures than charge-ordered states in other high-temperature superconductors. By combining crystallographic and spectroscopic measurements, the origin of this phenomenon is traced to the epitaxial relationship with the underlying substrate. This discovery opens new perspectives for the investigation of charge order and its influence on the electronic properties of the cuprates. In a separate set of RXS experiments on superlattices with alternating nickel and dysprosium oxides, several temperature- and magnetic-field-induced magnetic phase transitions are discovered. These observations are explained in a model based on transfer of magnetic order and magneto-crystalline anisotropy between the Ni and Dy subsystems, thus establishing a novel model system for the interplay between transition-metal and rare-earth magnetism.
目次
Introduction.- Resonant X-Ray Scattering.- Introduction to Charge Order in the Cuprates.- Charge Order in (CaxLa1 x)(Ba1.75 xLa0.25+x)Cu3Oy Single Crystals.- Charge Order in YBa2Cu3O6+x Thin Flms.- Introduction to Antiferromagnetism in Ultrathin Nickelate Layers.- Coupling Between 3d and 4f Spin Sublattices in LaNiO3-Based Heterostructures.- Closing Statement.
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