The Dingle plot of Shubnikov-de Haas oscillations in quasi-one-dimensional GaAs-AlGaAs heterojunctions fabricated by wet etching is found to exhibit a deviation from linearity. It is possible to extract an effective conducting width of the wire from such a plot which is found to be in good agreement with the width derived from one-dimensional subband depopulation effects.
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Lakrimi et al. (1989) studied this question.
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