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TitlePlateau flatness in the ACQHR: Do gates really help?
Publication TypeJournal Article
Year of Publication2003
AuthorsInglis, A.D., Wood B.M., Côté M., Young R.B., and Early M.D.
JournalIEEE Transactions on Instrumentation and Measurement
Pagination569 - 573
Date Published2003
ISSN00189456 (ISSN)
KeywordsAudio frequency measurements, Back gates, Electric potential, Electric resistance measurement, Gates (transistor), Hall effect devices, Quantum hall effect, Quantum Hall resistance, Quantum theory, Resistors
AbstractWe describe audio frequency measurements of quantum Hall resistors mounted with and without back-gates. We show that by gating the devices, flat plateaux can be obtained, but this can also lead to ambiguities in the measured Hall values. The current dependence of the Hall resistance also varies with the gate voltage, but the criteria of a) a flat plateau and b) zero current dependence are not equivalent. This emphasises the need to establish rigorous and fundamental criteria before ac resistance values can be based directly on the quantum Hall effect.

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