Thermoelectric Characterization of the Kondo Resonance in Nanowire Quantum Dots

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Abstract

We experimentally verify hitherto untested theoretical predictions about the thermoelectric properties of Kondo correlated quantum dots (QDs). The specific conditions required for this study are obtained by using QDs epitaxially grown in nanowires, combined with a recently developed method for controlling and measuring temperature differences at the nanoscale. This makes it possible to obtain data of very high quality both below and above the Kondo temperature, and allows a quantitative comparison with theoretical predictions. Specifically, we verify that Kondo correlations can induce a polarity change of the thermoelectric current, which can be reversed either by increasing the temperature or by applying a magnetic field.

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  • Condensed Matter Physics
Original languageEnglish
Article number206801
JournalPhysical Review Letters
Volume121
Issue number20
Publication statusPublished - 2018 Nov 16
Publication categoryResearch
Peer-reviewedYes