Plateau flatness in the ACQHR: do gates really help?
| Autor: | Barry Wood, A.D. Inglis, M. Cote, R.B. Young, M.D. Early |
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| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
Physics
Condensed matter physics Flatness (systems theory) Thermal Hall effect Quantum Hall effect Condensed Matter::Mesoscopic Systems and Quantum Hall Effect law.invention Computer Science::Emerging Technologies law Hall effect Hall effect sensor Electrical and Electronic Engineering Resistor Electric current Instrumentation Computer Science::Databases Audio frequency |
| Popis: | We 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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