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arXiv · 1911.06012

Thermoelectric Transport in a Three-Channel Charge Kondo Circuit

T. K. T. Nguyen·M. N. Kiselev
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Abstract

We investigate theoretically the thermoelectric transport through a circuit implementation of the three-channel "charge" Kondo model quantum simulator [Z. Iftikhar et al., Science 360, 1315 (2018)]. The universal temperature scaling law of the Seebeck coefficient is computed perturbatively approaching the non-Fermi liquid strong coupling fixed point using abelian bosonization technique. The predicted $T^{1/3}\log T$ scaling behavior of the thermoelectric power sheds a light on the properties of $Z_3$ emerging parafermions and gives an access to exploring pre-fractionalized zero modes in the quantum transport experiments. We discuss a generalization of approach for investigating a multi-channel Kondo problem with emergent $Z_N\to Z_M$ crossovers between "weak" non-Fermi liquid regimes corresponding to different low-temperature fixed points.

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T. K. T. Nguyen, M. N. Kiselev. 2019-11-14. Thermoelectric Transport in a Three-Channel Charge Kondo Circuit. https://doi.org/10.1103/physrevlett.125.026801

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