The Gehring Lab is based at the UCLouvain and focuses on understanding the physics of mesoscopic and nano-scale functional devices. To this end we investigate functionalities like the spin-to-charge conversion in topological materials or the thermoelectric heat-to-charge conversion in single-molecule devices using cryogenic magnetotransport experiments and scanning probe microscopy.
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MAGNETIC-FIELD UNIVERSALITY OF THE KONDO EFFECT REVEALED BY THERMOCURRENT SPECTROSCOPY
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.