title: Using a tunable quantum wire to measure the large out-of-plane spin splitting of quasi two-dimensional holes in a GaAs nanostructure.
abstract: The out-of-plane g-factor g([perpendicular])(*) for quasi two-dimensional (2D) holes in a (100) GaAs heterostructure is studied using a variable width quantum wire. A direct measurement of the Zeeman splitting is performed in a magnetic field applied perpendicular to the 2D plane. We measure an out-of-plane g-factor up to g([perpendicular])(*) = 5, which is larger than previous optical studies of g([perpendicular])(*) and is approaching the long predicted but never experimentally verified out-of-plane g-factor of 7.2 for heavy holes.
authors.affiliation: School of Physics, University of New South Wales, Sydney NSW 2052, Australia.
authors.forename: A
authors.initials: A
authors.lastname: Srinivasan
authors.forename: L A
authors.initials: LA
authors.lastname: Yeoh
authors.forename: O
authors.initials: O
authors.lastname: Klochan
authors.forename: T P
authors.initials: TP
authors.lastname: Martin
authors.forename: J C H
authors.initials: JC
authors.lastname: Chen
authors.forename: A P
authors.initials: AP
authors.lastname: Micolich
authors.forename: A R
authors.initials: AR
authors.lastname: Hamilton
authors.forename: D
authors.initials: D
authors.lastname: Reuter
authors.forename: A D
authors.initials: AD
authors.lastname: Wieck