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arXiv · 2111.12598

Magnetic Field Universality of the Kondo Effect Revealed by Thermocurrent Spectroscopy

Chunwei Hsu·Theo A. Costi·David Vogel·Christina Wegeberg·Marcel Mayor·Herre S. J. van der Zant·Pascal Gehring
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Abstract

Probing the universal low temperature magnetic field scaling of Kondo-correlated quantum dots via electrical conductance has proved to be experimentally challenging. Here, we show how to probe this in nonlinear thermocurrent spectroscopy applied to a molecular quantum dot in the Kondo regime. Our results demonstrate that the bias-dependent thermocurrent is a sensitive probe of universal Kondo physics, directly measures the splitting of the Kondo resonance in a magnetic field, and opens up possibilities for investigating nanosystems far from thermal and electrical equilibrium.

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Chunwei Hsu, Theo A. Costi, David Vogel, Christina Wegeberg, Marcel Mayor, Herre S. J. van der Zant, Pascal Gehring. 2021-11-24. Magnetic Field Universality of the Kondo Effect Revealed by Thermocurrent Spectroscopy. https://doi.org/10.1103/physrevlett.128.147701

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