Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 22 for “"competing interactions"”.
-
Ferromagnetic manganites: spin-polarized conduction and competing interactions
Electronic properties of solids are vitally important for modern technology, one may think of microelectronics, magnetic data storage, communication technologies and others. Sometimes, it seems possible to postpone the step of fundamental understanding when starting the application of a new …
-
Competition Between Different Non-Covalent Interactions in Cluster Ions
Non-covalent interactions are important in ionic systems, where ion-molecule interactions must compete with molecule-molecule interactions. This competition between different non-covalent interactions ultimately governs the behavior of many processes. In this Thesis, competing noncovalent …
-
Study of thermal kinetics in artificial spin ice systems
… frustration, a phenomenon that arises when competing interactions cannot be simultaneously satisfied within the system. While the ground states of these artificial systems have been previously studied, this thesis focuses on the dynamic process around the ground state of these systems. In …
-
Revitalizing Simulations of Colloidal and Interfacial Systems: From Atomistic Trajectories to Data-Centric Insights
… investigating complex systems characterized by competing interactions. Structured around three interrelated themes, the research develops methods to tackles challenges in water-in-oil emulsions, chemical inhibition in asphaltene aggregation, and adsorption energy prediction. While each theme …
-
Infrared spectroscopy of ion-hydrocarbon clusters
… components; and it is the balance between these competing interactions which governs their chemistry. This Thesis aims at exploring ion•••hydrocarbon interactions, then ion•••water•••alkane interactions. To accomplish this, a combination of gas phase infrared predissociation spectroscopy (IRPD) …
-
Relevanz und Nutzung von Anionen-pi Wechselwirkungen
… For this purpose the nature of the anion-pi interactions has to be examined. The present studies show the relevance of this interaction in solution and in the solid state. The solid state studies showed a high flexibility in the relative orientation of the anion to the pi-system and that it …
-
Going with the flow or swimming against the current?: The influence of rules and norms on advocacy strategies of NGO coalitions along the Mekong River
… over advocacy strategies. Different patterns of interactions were identified; these are 1) complementary interactions between formal rules, informal rules and norms 2) competing interactions between formal rules, informal rules and norms. Actors play important roles in both of these forms of …
-
Percolation phenomena in amorphous iron-nickel alloys
… of a dilute magnet. Complex models involving competing interactions are not required to explain the concentration dependence of the approach to saturation. Various parameters describing the excitation of spin waves were extracted from the magnetization data. There has been a great deal of …
-
Neutron Emission Following Nuclear Muon Capture in Al
… a thorough understanding of the backgrounds and competing interactions. Therefore, the AlCap collaboration was formed to study particle emissions from μ− + Al-27 → νμ + M g-27. This dissertation will present the results of the neutron emissions from this study, and includes a measurement of the …
-
On the reaction coordinate optimality for reversible aggregation kinetics
… separation in aggregating systems with competing interactions. Keywords: aggregation; optimal reaction coordinates; microcanonical analysis; Monte Carlo simulations; Brownian dynamics simulations
-
Characterising the molecular response of Agaricus bisporus to mushroom virus X infection
… of anastomosis were revealed in varietal interactions and showed evidence of hyphae remodelling in compatible strains, metabolic starvation responses in competing interactions and antagonistic oxidative stresses in vegetative incompatible interactions. Molecular responses revealed …
-
Exotic phenomena in rare-earth based geometrically frustrated magnets
… to when a system cannot simultaneously satisfy competing interactions, which can lead to a macroscopic degeneracy in the ground state of the system. Materials with geometric frustration, where competing interactions occur due to the crystal geometry alone, have been shown to host a wealth of …
-
Thermal activation, long-range ordering, and topological frustration of artificial spin ice
Frustrated systems, typically characterized by competing interactions that cannot all be simultaneously satisfied, are ubiquitous in nature and display many rich phenomena and novel physics. Artificial spin ices (ASIs), arrays of lithographically patterned Ising-like single-domain magnetic …
-
Neutron Scattering Studies of Unusual Spin Structure and Local Correlation in Complex Oxides
… systems are characterized by a multitude of competing ground states that result from the close coupling between charge, lattice, orbital, and spin degrees of freedom, which can be tuned by chemical substitution, strain induction, or by the application of external stimulus (e.g. pressure, …
-
Neutron scattering and thermodynamic studies of quantum magnetism on the kagomé lattice
… S = 1 moments. These measurements reveal competing interactions, which result in a spin glass ordering transition.
-
Dynamic simulations of colloidal dispersions: sticky and polarizable particles as building blocks for novel materials
… new materials, especially if the different interactions at play can be controlled and well understood. While there has been more work recently in the area of composite colloidal dispersions and their applications, there has been little focus on the use of processing to achieve different …
-
Synthesis, structure and properties of heavy metal pyrochlore oxides
… oxides, A2B2O6O’. In<br/>these systems, competing interactions are common and tend to emerge mainly at low<br/>temperatures. Magnetic properties are related to the contribution of d orbitals that transition<br/>metal (TM) offer and their interplay with the positive contribution coming …
-
Study of localization and correlation effects in disordered electronic systems
… transition and effects of short-ranged interactions on the stability of the localization fixed point are discussed. We find the Hubbard interaction to be relevant whereas the triplet interaction (in the particle-particle channel) is found to be irrelevant. This indicates that the …
-
Computational Study of Low-friction Quasicrystalline Coatings via Simulations of Thin Film Growth of Hydrocarbons and Rare Gases
… of size mismatch and relative strength of the competing interactions (adsorbate-substrate and between adsorbates) on the film growth and structure are systematically studied using rare gases with Lennard-Jones pair potentials. It is found that the relative strength of the interactions …
Page 1 of 2