Anisotropic Zeeman splitting in p-type GaAs quantum point contacts

Abstract

Low-temperature electrical conductance spectroscopy measurements of quantum point contacts implemented in p-type GaAs/AlGaAs heterostructures are used to study the Zeeman splitting of 1D subbands for both in-plane and out-of-plane magnetic field orientations. The resulting in-plane g-factors agree qualitatively with those of previous experiments on quantum wires while the quantitative differences can be understood in terms of the enhanced quasi-1D confinement anisotropy. The influence of confinement potential on the anisotropy is discussed and an estimate for the out-of-plane g-factor is obtained which, in contrast to previous experiments, is closer to the theoretical prediction.

References in corpus (7)

• Puzzle of the gamma-alpha and other phase transitions in cerium
• Zeeman splitting in ballistic hole quantum wires
• Spin Orientation of Holes in Quantum Wells
• Anisotropic modification of the effective hole $g$-factor by electrostatic confinement
• Using a tunable quantum wire to measure the large out-of-plane spin splitting of quasi two-dimensional holes in a GaAs nanostructure
• Interplay between one-dimensional confinement and crystallographic anisotropy in ballistic hole quantum wires
• Nanostructures in p-GaAs with improved tunability

Cited by in corpus (8)

• Spin-orbit interactions in inversion-asymmetric 2D hole systems: a variational analysis
• Dimensional reduction of the Luttinger Hamiltonian and g-factors of holes in symmetric two-dimensional semiconductor heterostructures
• Characterization of spin-orbit interactions of GaAs heavy holes using a quantum point contact
• Detection and control of spin-orbit interactions in a GaAs hole quantum point contact
• Mechanisms for strong anisotropy of in-plane g-factors in hole based quantum point contacts
• Magnetic Field Inducing Zeeman Splitting and Anomalous Conductance Reduction of Half-integer Quantized Plateaus in InAs Quantum Wires
• Asymmetric $g$ tensor in low-symmetry two-dimensional hole systems
• G-factors of hole bound states in spherically symmetric potentials in cubic semiconductors