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Showing 1 to 4 of 4 for “"Gitterdynamik"”.
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Thermische und langreichweitige Effekte in nichtlinearer Gitterdynamik mit Anwendungen in der Bio- und Nanophysik
Der Gegenstand dieser Arbeit ist die Rolle von langreichweitigen Wechselwirkungen und thermischen Effekten in nichtlinearen Gittern und ihre Anwendung in der Bio- und Nanophysik. Thematisch unterteilt sich die Arbeit in drei Bereiche, in denen die bekannte Fermi-Pasta-Ulam-Kette, die diskrete …
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Compactons in strongly nonlinear lattices
In the present work, we study wave phenomena in strongly nonlinear lattices. Such lattices are characterized by the absence of classical linear waves. We demonstrate that compactons – strongly localized solitary waves with tails decaying faster than exponential – exist and that they play a major …
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Ultrafast lattice dynamics in photoexcited nanostructures : femtosecond X-ray diffraction with optimized evaluation schemes
Within the course of this thesis, I have investigated the complex interplay between electron and lattice dynamics in nanostructures of perovskite oxides. Femtosecond hard X-ray pulses were utilized to probe the evolution of atomic rearrangement directly, which is driven by ultrafast optical …