Temperature Dependence of the Hall and Longitudinal Resistances in a Quantum Hall Resistance Standard |
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| Authors: | J Matthews M E Cage |
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| Affiliation: | University of Maryland, College Park, MD 20742;National Institute of Standards and Technology, Gaithersburg, MD 20899-8172 |
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| Abstract: | We present detailed measurements of the temperature dependence of the Hall and longitudinal resistances on a quantum Hall device (GaAs(7)] which has been used as a resistance standard at NIST. We find a simple power law relationship between the change in Hall resistance and the longitudinal resistance as the temperature is varied between 1.4 K and 36 K. This power law holds over seven orders of magnitude change in the Hall resistance. We fit the temperature dependence above about 4 K to thermal activation, and extract the energy gap and the effective g-factor. |
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| Keywords: | quantum Hall effect resistance standard temperature dependence |
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