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Conductance oscillations induced by longitudinal resonant states in heteroepitaxially defined electron waveguides
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7.It should be noted that the regular conductance oscillations were not observed in all samples. In many samples the measured conductance shows irregular oscillations and a strong drop at the end of each plateau. The feature reported in this letter is distinguishable from the others, since they exhibit very different temperature dependence.
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10.The depletion field can be caused by surface states and residual defects. Residual defects, if they are present, would cause nonregular oscillations and a strong drop at the end of the plateaus.8 These were not observed in the samples measured for this work. See also Ref. 7.
11.See, for example, C. W. J. Beenakker and H. van Houten, in Solid State Physics, edited by H. Ehrenreich and D. Turnbull (Academic, New York, 1991), Vol. 44, p. 112.
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