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Showing 1 to 4 of 4 for “"local excitations"”.
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Interplay between FQH Ground States, Regular Graphs, Binary Invariants, and [formula] -Algebras
… structure, conjointly with anyonic statistics of local excitations, are two of the intriguing, if not defining, features of these phases. For the eventual goal of classifying topologically ordered matter, a better understanding of FQH ground states is critical. This thesis takes a closer look at …
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Electronic Structure Modelling of Singlet Fission in Organic Photovoltaics
… electronic structure techniques to study the excitations involved in fission in molecular crystals and dimers, using the well-studied pentacene molecule as a reference system. Linear-scaling density functional theory (LS-DFT) is used to model the influence of the crystal environment on …
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Structural dynamics of photoexcited nanolayered perovskites studied by ultrafast x-ray diffraction
… coherent transport of vibrational energy from local excitations via delocalized phonon modes of the samples. The complex deformations in tailored multilayers are identified to give rise to highly nonlinear x-ray diffraction responses due to transient interference effects. The understanding of …
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Local excitons in insulators and impurity doped metals
The local exciton spectra of some alkali-halide insulators and impurity doped lithium metal are calculated using atomic clusters to simulate the bulk solid. The calculations are ab initio and use unrestricted Hartree-Fock and second order many body perturbation techniques. Accurate results are …