title: Zeeman splitting in ballistic hole quantum wires.
abstract: We have studied the Zeeman splitting in ballistic hole quantum wires formed in a (311)A quantum well by surface gate confinement. Transport measurements clearly show lifting of the spin degeneracy and crossings of the subbands when an in-plane magnetic field B is applied parallel to the wire. When B is oriented perpendicular to the wire, no spin splitting is discernible up to B = 8.8 T. The observed large Zeeman splitting anisotropy in our hole quantum wires demonstrates the importance of quantum confinement for spin splitting in nanostructures with strong spin-orbit coupling.
authors.affiliation: School of Physics, University of New South Wales, Sydney 2052, Australia. r.danneau@unsw.edu.au
authors.forename: R
authors.initials: R
authors.lastname: Danneau
authors.forename: O
authors.initials: O
authors.lastname: Klochan
authors.forename: W R
authors.initials: WR
authors.lastname: Clarke
authors.forename: L H
authors.initials: LH
authors.lastname: Ho
authors.forename: A P
authors.initials: AP
authors.lastname: Micolich
authors.forename: M Y
authors.initials: MY
authors.lastname: Simmons
authors.forename: A R
authors.initials: AR
authors.lastname: Hamilton
authors.forename: M
authors.initials: M
authors.lastname: Pepper
authors.forename: D A
authors.initials: DA
authors.lastname: Ritchie
authors.forename: U
authors.initials: U
authors.lastname: Zülicke