title: Highly anisotropic g-factor of two-dimensional hole systems
abstract: Coupling the spin degree of freedom to the anisotropic orbital motion of two-dimensional (2D) hole systems gives rise to a highly anisotropic Zeeman splitting with respect to different orientations of an in-plane magnetic field B relative to the crystal axes. This mechanism has no analog in the bulk band structure. We obtain good, qualitative agreement between theory and experimental data, taken in GaAs 2D hole systems grown on (113) substrates, showing the anisotropic depopulation of the upper spin subband as a function of in-plane B.
authors.affiliation: Institut fur Technische Physik III, Universitat Erlangen-Nurnberg, Staudtstrasse 7, D-91058 Erlangen, Germany.
authors.initials: R
authors.lastname: Winkler
authors.initials: SJ
authors.lastname: Papadakis
authors.lastname: De Poortere EP
authors.initials: M
authors.lastname: Shayegan