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Showing 1 to 8 of 8 for “"Quantum well states"”.
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Angle-resolved photoemission studies of two-dimensional electron systems
… of the film. Thin metallic films can support quantum well states, which are essentially electronic standing waves. Our work on Ag films grown on Ge(111) demonstrates that the incommensurate interface potential results in strong modifications to quantum well states. The observed electronic …
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Photoemission Studies of the Electronic Structure and Properties of Thin Lead Films
The quantum well states experience different types of confinement depending on whether they are above or below the Si valence band edge. They show large oscillations in the thermal stability. Adding 1 ML to a film can make it stable to an additional 50°C. The effective masses of the subbands …
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Photoemission studies of interface effects on thin film properties
… its boundaries gives rise to discrete electronic states, known as quantum well states, which dominate the film properties. This work investigates the use of film-substrate boundary modification as a means to control the film properties through the manipulation of its quantum well states. …
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Quantum-size effects in the electronic structure of novel self-organized systems with reduced dimensionality
… The scientific part starts from the study of quantum-size effects in the electronic structure of a two-dimensional Ag film on the supporting substrate Ni(111). Distinct quantum well states in the sp-band of Ag were observed in photoelectron spectra. Analysis of thickness- and angle-dependent …
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Surface and interface effects in valence band photoemission of noble metals
… photoemission probes sample initial and final states involved in direct transitions within the valence bands of the noble metals. Experiments studying these direct transitions have yielded fundamental understanding of the electronic structure of noble metals and of the valence band …
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Angle-resolved photoemission studies of quantum-electronic coherence in metallic thin-film systems
… and interface gives rise to distinct electronic states known as quantum-well states. Related to the electromagnetic standing waves in an optical Fabry-Perot interferometer, electrons in a quantum well undergo mirror-like reflections at the film surface and substrate-film interface. At thicknesses …
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Angle-resolved photoemission and first-principles studies of topological thin films
… ordinary insulator but have protected conducting states on their edge or surface. The exotic electronic properties of topological materials are of great interest for spin-related electronics and quantum computation. In this thesis research, the combination of angle-resolved photoemission …
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Elektronen-Korrelationen und Elektron-Phonon-Kopplung in einem nanostrukturierten Adsorbatsystem
In meiner Arbeit werden die Auswirkungen von Vielteilcheneffekten in einem niedrigdimensionalen Adsorbatsystem untersucht. Ein solches System kann als einfaches Modellsystem zum Verständnis der Vielteilcheneffekte dienen. Mit Hilfe der Photoelektronenspektroskopie und Rastertunnelspektroskopie kann …