Search for dissertations about: "topological insulators"
Showing result 1 - 5 of 25 swedish dissertations containing the words topological insulators.
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1. Topological Phase Transitions in Magnetic Nanostructures of Dirac Materials
Abstract : Over the past two decades, the discovery of topological Dirac materials, such as topological insulators and semimetals, has defined a new paradigm in condensed matter physics and established new platforms for realizing spin electronic devices and quantum computing. The novel quantum properties of these materials, which are mainly due to the presence of strong spin-orbit coupling, are invariant under topological transformations, making them more resilient to structural disorder, electromagnetic and thermal fluctuations in comparison to the conventional silicon-based materials. READ MORE
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2. Consequences of a non-trivial band-structure topology in solids : Investigations of topological surface and interface states
Abstract : The development and characterization of experimental setups for angle-resolved photoelectron spectroscopy (ARPES) and spin- and angle-resolved photoelectron spectroscopy (SARPES) is described. Subsequently, the two techniques are applied to studies of the electronic band structure in topologically non-trivial materials. READ MORE
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3. Graphene spin circuits and spin-orbit phenomena in van der Waals heterostructures with topological insulators
Abstract : Spintronics offers an alternative approach to conventional charge-based information processing by using the electron spin for next-generation non-volatile memory and logic technologies. To realize such technologies, it is necessary to develop spin-polarized current sources, spin interconnects, charge-to-spin conversion processes, and gate-tunable spintronic functionalities. READ MORE
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4. Electronic structure and transport in exotic nanostructures
Abstract : This thesis explores the physics of nanostructures involving nanowires, quantum dots, superconductors, and topological insulators. These systems serve as excellent platforms for fundamental physics studies and quantum technology applications. READ MORE
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5. Interactions on the edge of a quantum spin Hall insulator
Abstract : Effects from electron-electron interactions on the edge of a quantum spin Hall insulator are studied using bosonisation and renormalisation group methods. First, a quantum spin Hall device with a point contact connecting two of its edges is considered. READ MORE