Quantitative measurements of the thermopower of Andreev interferometers

Abstract

Using a new second derivative technique and thermometers which enable us to determine the local electron temperature in a mesoscopic metallic sample, we have obtained quantitative measurements of the low temperature field and temperature dependent thermopower of Andreev interferometers. As in previous experiments, the thermopower is found to oscillate as a function of magnetic field. The temperature dependence of the thermopower is nonmonotonic, with a minimum at a temperature of $\simeq 0.5$ K. These results are discussed from the perspective of Andreev reflection at the normal-metal/superconductor interface.

6 pages, 4 figures

References in corpus (1)

• Proximity effect thermometer for local temperature measurements on mesoscopic samples

Cited by in corpus (12)

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• Influence of Supercurrents on Low-Temperature Thermopower in Mesoscopic N/S Structures
• Thermopower Oscillation Symmetries in a Double-Loop Andreev Interferrometer