Collective oscillations in quantum rings: A broken symmetry case
Departament de Física,
Universitat de les Illes Balears, 07071 Palma de Mallorca, Spain
Revised: 9 June 2000
Published online: 15 December 2000
We present calculations within density functional theory of the ground state and collective electronic oscillations in small two-dimensional quantum rings. No spatial symmetries are imposed to the solutions and, as in a recent contribution, a transition to a broken symmetry solution in the intrinsic reference frame for an increasingly narrow ring is found. The oscillations are addressed by using real-time simulation. Conspicuous effects of the broken symmetry solution on the spectra are pointed out.
PACS: 73.20.Dx – Electron states in low-dimensional structures (superlattices, quantum well structures and multilayers) / 78.20.Bh – Theory, models and numerical simulation
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000