@article{reilly_facer_dzurak_kane_clark_stiles_jl o'brien_lumpkin_pfeiffer_west_2000, title={Many-body spin interactions in semiconductor quantum wires}, volume={53}, ISSN={["0004-9506"]}, DOI={10.1071/ph00040}, abstractNote={Zero length quantum wires (or point contacts) exhibit unexplained conductance
structure close to 0.7 � 2e
2 /h in the absence of an
applied magnetic field. We have studied the density- and temperature-dependent
conductance of ultra-low-disorder GaAs/AlGaAs quantum wires with nominal
lengths l=0 and 2�m,
fabricated from structures free of the disorder associated with modulation
doping. In a direct comparision we observe structure near 0.7 �
2e 2 /h
for l = 0, whereas thel
= 2�m wires show structure evolving with
increasing electron density to 0.5 � 2e
2 /h in
zero magnetic field, the value expected for an ideal
spin-split sub-band. Our results suggest the dominant mechanism through which
electrons interact can be strongly affected by the length of the 1D region.}, number={4}, journal={AUSTRALIAN JOURNAL OF PHYSICS}, author={Reilly, DJ and Facer, GR and Dzurak, AS and Kane, BE and Clark, RG and Stiles, PJ and JL O'Brien and Lumpkin, NE and Pfeiffer, LN and West, KW}, year={2000}, pages={543–552} }