Search for dissertations about: "lattice dynamics"
Showing result 11 - 15 of 128 swedish dissertations containing the words lattice dynamics.
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11. Magnetization dynamics on the nanoscale : From first principles to atomistic spin dynamics
Abstract : In this thesis first-principles methods, based on density functional theory, have been used to characterize a wide range of magnetic materials. Special emphasis has been put on pairwise magnetic interactions, such as Heisenberg exchange and Dzyaloshinskii-Moriya interactions, and also on in the Gilbert damping parameter. READ MORE
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12. Structure and Dynamics in Transition Metal Perovskites — An Optical Spectroscopy Study
Abstract : Transition metal oxides with the perovskite structure exhibit a vast number of exotic properties due to the large number of competing degrees of freedom at the Fermi surface. Together with couplings between and correlations within these degrees of freedom, this class of materials is of high interest from both a practical and theoretical point of view. READ MORE
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13. Magnetization dynamics of complex magnetic materials by atomistic spin dynamics simulations
Abstract : In recent years, there has been an intense interest in understanding the microscopic mechanism of laser induced ultrafast magnetization dynamics in picosecond time scales. Magnetization switching on such a time scale has potential to be a significant boost for the data storage industry. READ MORE
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14. Atomistic Spin Dynamics, Theory and Applications
Abstract : The topic of this Thesis is magnetization dynamics on atomic length scales. A computational scheme, Atomistic Spin Dynamics, based on density functional theory, the adiabatic approximation and the atomic moment approximation is presented. READ MORE
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15. Models for coupled active-passive population dynamics : Mathematical analysis and simulation
Abstract : In this dissertation, we study models for coupled active--passive pedestrian dynamics from mathematical analysis and simulation perspectives. The general aim is to contribute to a better understanding of complex pedestrian flows. READ MORE