title: Magnetic states in prismatic core multishell nanowires.
abstract: We study the electronic states of core multishell semiconductor nanowires, including the effect of strong magnetic fields. We show that the multishell overgrowth of a free-standing nanowire, together with the prismatic symmetry of the substrate, may induce quantum confinement of carriers in a set of quasi-1D quantum channels corresponding to the nanowire edges. Localization and interchannel tunnel coupling are controlled by the curvature at the edges and the diameter of the underlying nanowire. We also show that a magnetic field may induce either Aharonov-Bohm oscillations of the energy levels in the axial configuration, or a dimensional transition of the quantum states from quasi-1D to Landau levels for fields normal to the axis. Explicit predictions are given for nanostructures based on GaAs, InAs, and InGaN with different symmetries.
authors.affiliation: Dipartimento di Fisica, CNR-INFM Research Center on nanoStructures and bioSystems at Surfaces (S3), CNISM Unita di Ricerca di Modena, University of Modena and Reggio Emilia, Modena, Italy. giulio.ferrari@unimore.it
authors.forename: Giulio
authors.initials: G
authors.lastname: Ferrari
authors.forename: Guido
authors.initials: G
authors.lastname: Goldoni
authors.forename: Andrea
authors.initials: A
authors.lastname: Bertoni
authors.forename: Giampaolo
authors.initials: G
authors.lastname: Cuoghi
authors.forename: Elisa
authors.initials: E
authors.lastname: Molinari