Instabilities in quantum point contact s
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M.N. Wybourne; Jolinda C. Smith; C. Berven; R. Ramasubramaniam; S.M. Goodnick
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Article
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1996
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Elsevier Science
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English
β 220 KB
We discuss the appearance of strong nonlinearities including S-type negative differential conductance in the I -V characteristics of quantum point contact (QPC) structures. Timedependent measurements demonstrate that the highly nonlinear d.c. I -V features are associated with a temporal average of r