Kondo effect in a quantum dot embedded between topological superconductors

Lara, G. A.; Ramos-Andrade, J. P.; Zambrano, D.; Orellana, P. A.

Abstract

In this article, we study the quantum transport through a single-level quantum dot in the Kondo regime, coupled to current leads and embedded between two one-dimensional topological superconductors, each hosting Majorana zero modes at their ends. The Kondo effect in the quantum dot is modeled by the mean-field finite -U auxiliary bosons approximation and solved by using the non-equilibrium Green's function approach. First, we calculate the density of states of the quantum dot, and then both the current and the differential conductance through the quantum dot in order to characterize the interplay between the Kondo resonance and Majorana zero modes. The results reveal that the presence of Majorana zero modes modifies the Kondo resonance exhibiting an anti-resonance structure in the density of states, leading to obtain spin-resolved behavior of the measurable current and differential conductance. Our findings could help to understand the behavior of the Kondo effect in connection with Majorana zero modes.

Más información

Título según WOS: Kondo effect in a quantum dot embedded between topological superconductors
Título de la Revista: PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
Volumen: 152
Editorial: Elsevier
Fecha de publicación: 2023
DOI:

10.1016/j.physe.2023.115743

Notas: ISI