Magnetoconductivity probe of inhomogeneity in GaAs-GaAlAs heterojunctions

M. Lakrimi; A. D.C. Grassie; K. M. Hutchings; J. P. Bird; J. J. Harris; C. T. Foxon

doi:10.1016/0921-4526(93)90350-F

Magnetoconductivity probe of inhomogeneity in GaAs-GaAlAs heterojunctions

M. Lakrimi
, A. D.C. Grassie
, K. M. Hutchings
, J. P. Bird
, J. J. Harris
, C. T. Foxon

Department of Electrical Engineering

University of Sussex
University of Oxford
Roedean School
Koninklijke Philips N.V.
Imperial College London
University of Nottingham

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We have analysed the variation of the amplitude of the magnetoconductivity peaks of the 2DEG in GaAs/AlGaAs heterojunctions as a function of Landau level index number. We interpret our observations in terms of a scattering change as the magnetic field is varied and the size of the orbit dimensions relative to the scale of long-range potential fluctuations. Furthermore, the experimental values of the conductivity peaks are compared with theoretical predictions. Agreement is possible over a limited range of magnetic field and only when a low areal density of scatterers is used.

Original language	English
Pages (from-to)	206-210
Number of pages	5
Journal	Physica B: Condensed Matter
Volume	184
Issue number	1-4
DOIs	https://doi.org/10.1016/0921-4526(93)90350-F
State	Published - Feb 1993

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title = "Magnetoconductivity probe of inhomogeneity in GaAs-GaAlAs heterojunctions",

abstract = "We have analysed the variation of the amplitude of the magnetoconductivity peaks of the 2DEG in GaAs/AlGaAs heterojunctions as a function of Landau level index number. We interpret our observations in terms of a scattering change as the magnetic field is varied and the size of the orbit dimensions relative to the scale of long-range potential fluctuations. Furthermore, the experimental values of the conductivity peaks are compared with theoretical predictions. Agreement is possible over a limited range of magnetic field and only when a low areal density of scatterers is used.",

author = "M. Lakrimi and Grassie, \{A. D.C.\} and Hutchings, \{K. M.\} and Bird, \{J. P.\} and Harris, \{J. J.\} and Foxon, \{C. T.\}",

year = "1993",

month = feb,

doi = "10.1016/0921-4526(93)90350-F",

language = "English",

volume = "184",

pages = "206--210",

journal = "Physica B: Condensed Matter",

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TY - JOUR

T1 - Magnetoconductivity probe of inhomogeneity in GaAs-GaAlAs heterojunctions

AU - Lakrimi, M.

AU - Grassie, A. D.C.

AU - Hutchings, K. M.

AU - Bird, J. P.

AU - Harris, J. J.

AU - Foxon, C. T.

PY - 1993/2

Y1 - 1993/2

N2 - We have analysed the variation of the amplitude of the magnetoconductivity peaks of the 2DEG in GaAs/AlGaAs heterojunctions as a function of Landau level index number. We interpret our observations in terms of a scattering change as the magnetic field is varied and the size of the orbit dimensions relative to the scale of long-range potential fluctuations. Furthermore, the experimental values of the conductivity peaks are compared with theoretical predictions. Agreement is possible over a limited range of magnetic field and only when a low areal density of scatterers is used.

AB - We have analysed the variation of the amplitude of the magnetoconductivity peaks of the 2DEG in GaAs/AlGaAs heterojunctions as a function of Landau level index number. We interpret our observations in terms of a scattering change as the magnetic field is varied and the size of the orbit dimensions relative to the scale of long-range potential fluctuations. Furthermore, the experimental values of the conductivity peaks are compared with theoretical predictions. Agreement is possible over a limited range of magnetic field and only when a low areal density of scatterers is used.

UR - https://www.scopus.com/pages/publications/0027541999

U2 - 10.1016/0921-4526(93)90350-F

DO - 10.1016/0921-4526(93)90350-F

M3 - Article

AN - SCOPUS:0027541999

SN - 0921-4526

VL - 184

SP - 206

EP - 210

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 1-4

ER -

Magnetoconductivity probe of inhomogeneity in GaAs-GaAlAs heterojunctions

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