Interplay of Majorana and Kondo physics in a spin-charge entangled double quantum dot*

The signatures of Majorana zero-energy mode leaking into a spin-charge entangled double quantum dot

are investigated theoretically in the strong electron correlation regime.

The considered setup consists of two capacitively coupled

quantum dots attached to external contacts and side-attached to topological

superconducting wire hosting Majorana quasiparticles.

We show that the presence of Majorana mode gives rise to

unique features in the local density of states in the SU(4) Kondo regime.

Moreover, it greatly modifies the gate voltage dependence of the linear conductance,

leading to fractional values of the conductance.

We also analyze the effect of a finite length of topological wire

and demonstrate that non-zero overlap of Majorana modes at the ends of the wire

is revealed in local extrema present in the local density of states

of the dot coupled directly to the wire.

Finally, we discuss the thermoelectric signatures

of the interplay between the Majorana and Kondo physics.