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Quantitative measurements of the thermal resistance of Andreev interferometers

Z. Jiang·V. Chandrasekhar
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Abstract

Using a local thermometry technique, we have been able to quantitatively measure the thermal resistance $R^T$ of diffusive Andreev interferometers. We find that $R^T$ is strongly enhanced from its normal state value at low temperatures, and behaves non-linearly as a function of the thermal current through the sample. We also find that the $R^T$ oscillates as a function of magnetic flux with a fundamental period corresponding to one flux quantum $Φ_0=h/2e$, demonstrating the phase coherent nature of thermal transport in these devices. The magnitude of $R^T$ is larger than predicted by recent numerical simulations.

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Z. Jiang, V. Chandrasekhar. 2005-01-20. Quantitative measurements of the thermal resistance of Andreev interferometers. https://doi.org/10.1103/physrevb.72.020502

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