Magnetic field induced shell-to-core confinement transition in type-II semiconductor quantum wires

Abstract

We investigate the excitonic properties of a core-multishell semiconductor nanowire with type-II band mismatch, i.e. with spatially separated electrons and holes, under an external magnetic field. Our results demonstrate that, depending on the core wire radius, the carrier in the type-II band exhibits either a quantum dot-like or a quantum ring-like energy spectrum, corresponding to a carrier confinement in the core wire or in the outer shell, respectively. In the latter, a shell-to-core confinement transition can be induced by increasing the magnetic field intensity, which may lead to interesting photocurrent properties of these confining structures, tunable by the external field.

References in corpus (5)

• Quantum Confinement in Si and Ge Nanostructures
• Magnetic states in prismatic core multishell nanowires
• Tunable optical Aharonov-Bohm effect in a semiconductor quantum ring
• Interfacial confinement in core-shell nanowires due to high dielectric mismatch
• Eccentricity effects on the quantum confinement in double quantum rings