title: Large quantum rings in the ν > 1 quantum Hall regime.
abstract: We study computationally the ground-state properties of large quantum rings in the filling-factor ν>1 quantum Hall regime. We show that the arrangement of electrons into different Landau levels leads to clear signatures in the total energies as a function of the magnetic field. In this context, we discuss possible approximations for the filling factor ν in the system. We are able to characterize integer-ν states in quantum rings in an analogy with conventional quantum Hall droplets. We also find a partially spin-polarized state between ν = 2 and 3. Despite the specific topology of a quantum ring, this state is strikingly reminiscent of the recently found ν = 5/2 state in a quantum dot.
authors.affiliation: Institut für Theoretische Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany. European Theoretical Spectroscopy Facility (ETSF),. Institut für Theoretische Physik, Johannes Kepler Universität, A-4040 Linz, Austria.
authors.forename: E
authors.initials: E
authors.lastname: Räsänen
authors.forename: M
authors.initials: M
authors.lastname: Aichinger