Abstract
We have studied the Zeeman splitting in ballistic hole quantum wires formed in 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 is applied parallel to the wire. When is oriented perpendicular to the wire, no spin splitting is discernible up to . 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.
- Received 12 December 2005
DOI:https://doi.org/10.1103/PhysRevLett.97.026403
©2006 American Physical Society