title: Giant anisotropy of Zeeman splitting of quantum confined acceptors in Si/Ge.
abstract: Shallow acceptor levels in Si/Ge/Si quantum well heterostructures are characterized by resonant-tunneling spectroscopy in the presence of high magnetic fields. In a perpendicular magnetic field we observe a linear Zeeman splitting of the acceptor levels. In an in-plane field, on the other hand, the Zeeman splitting is strongly suppressed. This anisotropic Zeeman splitting is shown to be a consequence of the huge light-hole--heavy-hole splitting caused by a large biaxial strain and a strong quantum confinement in the Ge quantum well.
authors.affiliation: Institut für Festkörperphysik, Universität Hannover, Appelstrasse 2, 30167 Hannover, Germany.
authors.forename: K-M
authors.initials: KM
authors.lastname: Haendel
authors.forename: R
authors.initials: R
authors.lastname: Winkler
authors.forename: U
authors.initials: U
authors.lastname: Denker
authors.forename: O G
authors.initials: OG
authors.lastname: Schmidt
authors.forename: R J
authors.initials: RJ
authors.lastname: Haug