Many-body Spin Interactions in Semiconductor Quantum Wires

D. J. Reilly, G. R. Facer, A. S. Dzurak, B. E. Kane, R. G. Clark, P. J. Stiles, J. L. O'Brien, N. E. Lumpkin, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Zero length quantum wires (or point contacts) exhibit unexplained conductance structure close to 0.7 × 2e2/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 μm, fabricated from structures free of the disorder associated with modulation doping. In a direct compansion we observe structure near 0.7 × 2e2/h for l = 0, whereas the l = 2 μm wires show structure evolving with increasing electron density to 0.5 × 2e2/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.

Original languageEnglish
Pages (from-to)543-552
Number of pages10
JournalAustralian Journal of Physics
Issue number4
Publication statusPublished - Dec 2000
Externally publishedYes


Dive into the research topics of 'Many-body Spin Interactions in Semiconductor Quantum Wires'. Together they form a unique fingerprint.

Cite this