
TY  - JOUR
A1  - Reilly, D. J. 
A1  - Pfeiffer, L. N. 
A1  - Facer, G. R. 
A1  - West, K. W. 
A1  - Dzurak, A. S. 
A1  - Kane, B. E. 
A1  - Clarke, R. G. 
A1  - Stiles, P. J. 
A1  - O'Brien, J. L. 
A1  - Lumpkin, N. E. 
T1  - Many-body Spin Interactions in Semiconductor Quantum Wires
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 2001
VL  - 53
IS  - 4
SP  - 543
EP  - 552
KW  - 
UR  - https://doi.org/10.1071/PH00040 
N2  - 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 2µm, 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 = 2µm 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. 
ER  -

