Tuning of heat and charge transport by Majorana fermions

TL;DR

This paper theoretically explores how Majorana fermions influence heat and charge transport in a quantum dot system, revealing controllable resonances and potential for tuning thermoelectric properties.

Contribution

It introduces a novel system setup where Majorana fermions enable control over thermal and electrical conductances through resonance tuning.

Findings

Resonances in conductance can be controlled by coupling asymmetry.

Thermopower and thermoelectric efficiency are affected by Majorana fermions.

The system acts as a tunable heat and charge transport device.

Abstract

We investigate theoretically thermal and electrical conductances for the system consisting of a quantum dot (QD) connected both to a pair of Majorana fermions residing the edges of a Kitaev wire and two metallic leads. We demonstrate that both quantities reveal pronounced resonances, whose positions can be controlled by tuning of an asymmetry of the couplings of the QD and a pair of MFs. Similar behavior is revealed for the thermopower, Wiedemann-Franz law and dimensionless thermoelectric figure of merit. The considered geometry can thus be used as a tuner of heat and charge transport assisted by MFs.