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Magnetoplasmon excitations and spin density instabilities in an integer quantum Hall system with a tilted magnetic field
We study the magnetoplasmon collective mode excitations of integer quantum Hall systems in a parabolically confined quantum well nanostructure in the presence of a tilted magnetic field by using the time-dependent Hartree-Fock approximation. For even integer filling, we find that the dispersion of a spin density mode has a magneto-roton …