Miquel Royo, Andrea Bertoni, Guido Goldoni
Magnetic states of the electron gas confined in core-shell nanowires are calculated in a mean-field self-consistent approach for a transverse field of arbitrary strength and orientation, and magneto-conductance is predicted within a Landauer approach. Calculations have been performed including radial modulation of realistic GaAs/AlGaAs devices with prismatic symmetry, at different doping and charge density regimes. Magnetic states in the Quantum Hall regime can partially be described in terms of Landau levels and edge states, familiar from two-dimensional electron gases. However, particularly at high free charge density, where the dominating electron-electron interaction leads to strongly inhomogeneous localization, the magnetic field competes with the electrostatic potential, resulting in complex dispersions and negative magneto-resistance. In the high density regime the marked magnetic anisotropy of the magneto-conductance is a direct probe of the inhomogeneous electron gas localization induced by the prismatic geometry.
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http://arxiv.org/abs/1211.5444
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