2049 1999 eng 111 120 39 bookpart Friedr. Vieweg & Sohn Braunschweig 0 2007-06-25 -- -- We review ground-state properties and collective excitations of semiconductor quantum dots in a magnetic field obtained from current-spin density-functional theory. Due to exchange-correlation, a generalized Hund’s rule in magnetic field can be established which leads to spin alignment in partially occupied energy shells at the Fermi energy. This results, in distinct spin structures in single-electron addition spectra. Current-dependent exchange-correlation modifies the magnetic-field dependence of the ground state configuration and leads to deviations from plain spin-density calculations. Moreover it gives rise to spontaneous current textures at zero magnetic field. Collective excitation spectra, explicitly calculated for inelastic light scattering, exhibit novel features in their magnetic field dependence due to a finite ground-state spin density. Advances in Solid State Physics 978-3-540-44553-1 10.1007/BFb0107469 peer-reviewed Oliver Steffens Michael Suhrke Ulrich Rössler eng uncontrolled Spin Density eng uncontrolled Fermi Energy eng uncontrolled Collective Excitation eng uncontrolled Addition Spectrum eng uncontrolled Inelastic Light Scattering Physik Fakultät Angewandte Natur- und Kulturwissenschaften Externe Publikationen Labor Bauphysik Materialien und Produktion