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

doi:10.1071/ph00040

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 journal › Article › peer-review

2 Scopus citations

Abstract

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 language	English (US)
Pages (from-to)	543-552
Number of pages	10
Journal	Australian Journal of Physics
Volume	53
Issue number	4
DOIs	https://doi.org/10.1071/ph00040
State	Published - 2000
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1071/ph00040

Cite this

@article{0e9a97b948d3468f8c3700375d3cfee2,

title = "Many-body Spin Interactions in Semiconductor Quantum Wires",

abstract = "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.",

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

year = "2000",

doi = "10.1071/ph00040",

language = "English (US)",

volume = "53",

pages = "543--552",

journal = "Australian Journal of Physics",

issn = "0004-9506",

publisher = "Commonwealth Scientific And Industrial Research Organization",

number = "4",

}

TY - JOUR

T1 - Many-body Spin Interactions in Semiconductor Quantum Wires

AU - Reilly, D. J.

AU - Facer, G. R.

AU - Dzurak, A. S.

AU - Kane, B. E.

AU - Clark, R. G.

AU - Stiles, P. J.

AU - O'Brien, J. L.

AU - Lumpkin, N. E.

AU - Pfeiffer, L. N.

AU - West, K. W.

PY - 2000

Y1 - 2000

N2 - 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.

AB - 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.

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U2 - 10.1071/ph00040

DO - 10.1071/ph00040

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SP - 543

EP - 552

JO - Australian Journal of Physics

JF - Australian Journal of Physics

IS - 4

ER -

Many-body Spin Interactions in Semiconductor Quantum Wires

Abstract

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