2009/09/29 by J. C. H. Chen, O. Klochan, A. P. Micolich +9
Physics and Astronomy · #Bar (unit) #Condensed matter physics #Electron #Energy level splitting #Geometry #Heterojunction #Landé g-factor #Magnetic field #Magnetic properties of thin films #Orientation (vector space) #Perpendicular #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum and electron transport phenomena #Quantum mechanics #Quantum wire #Spin (aerodynamics) #Spin polarization #Zeeman effect #Zero field splitting #cond-mat.mes-hall
paper · pdf · doi:10.1088/1367-2630/12/3/033043
arxiv created 2009/09/29 · openalex publication_date 2010/03/24 · arxiv updated 2015/05/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
In this paper, We study the Zeeman spin-splitting in hole quantum wires oriented along the [011] and crystallographic axes of a high mobility undoped (100)-oriented AlGaAs/GaAs heterostructure. Our data show that the spin-splitting can be switched 'on' (finite g * ) or 'off' (zero g * ) by rotating the field from a parallel to a perpendicular orientation with respect to the wire, and the properties of the wire are identical for the two orientations with respect to the crystallographic axes. We also find that the g -factor in the parallel orientation decreases as the wire is narrowed. This is in contrast to electron quantum wires, where the g -factor is enhanced by exchange effects as the wire is narrowed. This is evidence for a k -dependent Zeeman splitting that arises from the spin- nature of holes.