Magnetic depopulation of 1D subbands in a narrow 2D electron gas in a GaAs:AlGaAs heterojunction

K. F. Berggren; T. J. Thornton; D. J. Newson; M. Pepper

doi:10.1103/PhysRevLett.57.1769

Magnetic depopulation of 1D subbands in a narrow 2D electron gas in a GaAs:AlGaAs heterojunction

K. F. Berggren, T. J. Thornton, D. J. Newson, M. Pepper

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Abstract

We present results on the transverse magnetoconductance in the range 0.3 to 8 T of a narrow, variable-width channel in a GaAs:AlGaAs heterojunction. As the width of the channel is decreased below 0.25 m the structure in the magnetoconductance changes from Shubnikov-de Haas oscillations to the magnetic depopulation of one-dimensional subbands. A semiclassical WKB calculation is presented which gives good agreement with experiment.

Original language	English (US)
Pages (from-to)	1769-1772
Number of pages	4
Journal	Physical Review Letters
Volume	57
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.57.1769
State	Published - 1986
Externally published	Yes

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Physics and Astronomy(all)

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10.1103/PhysRevLett.57.1769

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title = "Magnetic depopulation of 1D subbands in a narrow 2D electron gas in a GaAs:AlGaAs heterojunction",

abstract = "We present results on the transverse magnetoconductance in the range 0.3 to 8 T of a narrow, variable-width channel in a GaAs:AlGaAs heterojunction. As the width of the channel is decreased below 0.25 m the structure in the magnetoconductance changes from Shubnikov-de Haas oscillations to the magnetic depopulation of one-dimensional subbands. A semiclassical WKB calculation is presented which gives good agreement with experiment.",

author = "Berggren, {K. F.} and Thornton, {T. J.} and Newson, {D. J.} and M. Pepper",

year = "1986",

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language = "English (US)",

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T1 - Magnetic depopulation of 1D subbands in a narrow 2D electron gas in a GaAs:AlGaAs heterojunction

AU - Berggren, K. F.

AU - Thornton, T. J.

AU - Newson, D. J.

AU - Pepper, M.

PY - 1986

Y1 - 1986

N2 - We present results on the transverse magnetoconductance in the range 0.3 to 8 T of a narrow, variable-width channel in a GaAs:AlGaAs heterojunction. As the width of the channel is decreased below 0.25 m the structure in the magnetoconductance changes from Shubnikov-de Haas oscillations to the magnetic depopulation of one-dimensional subbands. A semiclassical WKB calculation is presented which gives good agreement with experiment.

AB - We present results on the transverse magnetoconductance in the range 0.3 to 8 T of a narrow, variable-width channel in a GaAs:AlGaAs heterojunction. As the width of the channel is decreased below 0.25 m the structure in the magnetoconductance changes from Shubnikov-de Haas oscillations to the magnetic depopulation of one-dimensional subbands. A semiclassical WKB calculation is presented which gives good agreement with experiment.

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Magnetic depopulation of 1D subbands in a narrow 2D electron gas in a GaAs:AlGaAs heterojunction

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