Aharonov-Bohm oscillations and electron gas transitions in hexagonal core-shell nanowires with an axial magnetic field

Abstract

We use spin-density-functional theory within an envelope function approach to calculate electronic states in a GaAs/InAs core-shell nanowire pierced by an axial magnetic field. Our fully 3D quantum modeling includes explicitly the description of the realistic cross-section and composition of the sample, and the electrostatic field induced by external gates in two different device geometries, gate-all-around and back-gate. At low magnetic fields, we investigate Aharonov-Bohm oscillations and signatures therein of the discrete symmetry of the electronic system, and we critically analyze recent magnetoconductance observations. At high magnetic fields we find that several charge and spin transitions occur. We discuss the origin of these transitions in terms of different localization and Coulomb regimes and predict their signatures in magnetoconductance experiments.

References in corpus (6)

• Strong tuning of Rashba spin orbit interaction in single InAs nanowires
• Magnetic states in prismatic core multishell nanowires
• Unintentional high density p-type modulation doping of a GaAs/AlAs core-multi-shell nanowire
• Signature of snaking states in the conductance of core-shell nanowires
• Spin and impurity effects on flux-periodic oscillations in core-shell nanowires
• Interplay among spin, orbital effects and localization in a GaAs two-dimensional electron gas in a strong in-plane magnetic field

Cited by in corpus (4)

• Electron localization and optical absorption of polygonal quantum rings
• Coulomb Blockade from the Shell of an InP-InAs Core-Shell Nanowire with a Triangular Cross Section
• Anisotropy of the spin-orbit coupling driven by a magnetic field in InAs nanowires
• In-gap corner states in core-shell polygonal quantum rings