Zeeman splitting in ballistic hole quantum wires.
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.
Danneau
R
R
School of Physics, University of New South Wales, Sydney 2052, Australia. r.danneau@unsw.edu.au
Klochan
O
O
Clarke
W R
WR
Ho
L H
LH
Micolich
A P
AP
Simmons
M Y
MY
Hamilton
A R
AR
Pepper
M
M
Ritchie
D A
DA
Zülicke
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U