Search for dissertations about: "topological"
Showing result 11 - 15 of 258 swedish dissertations containing the word topological.
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11. Theory of electronic structure and transport in heterostructure nanowires
Abstract : Today, semi-conductor nanowires can be grown with very high precision, using epitaxy. This allows for studies of new nanowire-based quantum devices, likely to be part of novel quantum technologies in the future. This thesis concerns nanostructures based on InAs nanowires. READ MORE
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12. Anomaly and Topology : On the axial anomaly, domain wall dynamics, and local topological markers in quantum matter
Abstract : Chiral anomalies and topological phases of matter form the basis of the research presented in this dissertation. The chiral anomaly is considered both in the context of magnetic Weyl semimetals and in the context of non-Hermitian Dirac actions. READ MORE
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13. Evaluation of NMR Knight shifts in metallic nanoparticles and topological matter
Abstract : Elucidating the surface electron states of transition metal compounds is of primary importance in main heterogeneous catalytic processes, such as the hydrogen and oxygen evolution reactions. Key property in all these processes is the position of the energy of the d-band center relative to the Fermi-level of the catalyst; it must be shifted close to the Fermi level to achieve balance between adsorption and desorption of the catalyst and the adsorbate. READ MORE
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14. Twisting and Gluing : On Topological Field Theories, Sigma Models and Vertex Algebras
Abstract : This thesis consists of two parts, which can be read separately. In the first part we study aspects of topological field theories. We show how to topologically twist three-dimensional N=2 supersymmetric Chern-Simons theory using a contact structure on the underlying manifold. READ MORE
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15. Robust Platforms for Superconductivity : Disorder Robustness and Topological Density of States Peaks
Abstract : We explore the connection between robust material platforms for superconductivity and the modern condensed matter physics paradigms of two-dimensional materials, topological states of matter, and odd-frequency superconductivity. Specifically, the recent discoveries of gapless topological matter and truly two-dimensional materials with graphene have greatly expanded the class of materials for which topology produces large, robust, even singular, density of states (DOS) peaks in the electronic structure that in turn are highly susceptible to new ordered states of matter, including superconductivity. READ MORE
