Heat conductance oscillations in two weakly connected charge Kondo circuits

TL;DR

This paper investigates heat conductance oscillations in weakly connected charge Kondo circuits, analyzing how these oscillations differ between Fermi liquid and non-Fermi liquid regimes and discussing experimental detection methods.

Contribution

It provides a detailed calculation of thermoelectric coefficients in charge Kondo circuits, highlighting heat conductance oscillations and their dependence on quantum dot regimes.

Findings

Heat conductance oscillates with gate voltage in both regimes.

Distinct signatures of non-Fermi liquid behavior are identified.

Analysis suggests experimental setups to observe these effects.

Abstract

We revisit a model describing Seebeck effect on a weak link between two charge Kondo circuits, which has been proposed in the [Phys. Rev. B 97, 085403 (2018)]. We calculate the thermoelectric coefficients in the perturbation theory assuming smallness of the reflection amplitudes of the quantum point contacts. We focus on the linear response equations for the heat conductance in three different scenarios as: Fermi liquid vs Fermi liquid, Fermi liquid vs non-Fermi liquid, nonFermi liquid vs non-Fermi liquid. The oscillations of the heat conductance as a function of the gate voltage of each quantum dot are analysed in both Fermi liquid and non-Fermi liquid regimes. We discuss possible experimental realizations of the model to observe the signatures of the non-Fermi liquid behaviour in the heat conductance measurements.