https://doi.org/10.1140/epjp/s13360-024-05544-x
Regular Article
Fano-Andreev effect in a T-shaped double quantum dot in the Coulomb blockade regime
1
Departamento de Física, Universidad Técnica Federico Santa María, Casilla 110 V, Valparaíso, Chile
2
Departamento de Física, Universidad Católica del Norte, Antofagasta, Chile
3
Departamento Acadêmico de Física, Universidade Tecnológica Federal do Paraná, Ponta Grossa, Brazil
Received:
26
December
2023
Accepted:
4
August
2024
Published online:
4
September
2024
We studied the effects of superconducting quantum correlations in a system consisting of two quantum dots, two normal leads, and a superconductor. Using the non-equilibrium Green’s functions method, we analyzed the transmission, density of states, and differential conductance of electrons between the normal leads. We found that the superconducting correlations resulted in Fano-Andreev interference, which is characterized by two antiresonance lineshapes in all of these quantities. This behavior was observed in both equilibrium and non-equilibrium regimes and persisted even when Coulomb correlations were taken into account using the Hubbard-I approximation. It is worth noting that the robustness of this behavior against these conditions has not been studied previously in the literature.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
