Temporal instabilities in the far-from-equilibrium transport of quantum point contacts

We report temporal conductance instabilities in the far-from-equilibrium transport through quantum point contacts. Random telegraph switching between conduction states is shown to have a maximum probability when the chemical potential of the injection electrode is close to a subband minimum. We show...

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Bibliographic Details
Published in:Europhysics letters 1997-07, Vol.39 (1), p.73-78
Main Authors: Smith, J. C, Wybourne, M. N, Berven, C, Ramasubramaniam, R, Goodnick, S. M
Format: Article
Language:English
Subjects:
73.20.Dx
73.20.Mf
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Summary:We report temporal conductance instabilities in the far-from-equilibrium transport through quantum point contacts. Random telegraph switching between conduction states is shown to have a maximum probability when the chemical potential of the injection electrode is close to a subband minimum. We show the RTS in these far-from-equilibrium experiments must have a different origin to that proposed for RTS in near-equilibrium measurements.
ISSN:0295-5075
1286-4854
DOI:10.1209/epl/i1997-00316-7