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Phys Rev Lett. 2006 Jul 14;97(2):026403. Epub 2006 Jul 11.

Zeeman splitting in ballistic hole quantum wires.

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  • 1School of Physics, University of New South Wales, Sydney 2052, Australia. r.danneau@unsw.edu.au

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.

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