Phys. Rev. Lett. 97, 026403 (2006) [4 pages]Zeeman Splitting in Ballistic Hole Quantum WiresReceived 12 December 2005; published 11 July 2006 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. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.97.026403
DOI:
10.1103/PhysRevLett.97.026403
PACS:
71.70.−d, 73.21.Hb, 73.23.Ad
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