Kondo and Majorana signatures near the singlet-doublet quantum phase transition

Abstract

We study the low energy spectrum of a correlated quantum dot embedded between the normal conducting and superconducting reservoirs and hybridized with the topological superconducting nanowire, hosting the Majorana end-modes. We investigate the leaking Majorana quasiparticle and inspect its interplay with the proximity induced on-dot pairing and correlations. In particular, we focus on the subgap Kondo effect near the quantum phase transition/crossover from the spinfull (doublet) to the spinless (BCS-type singlet) configurations. Treating the correlations perturbatively and within the NRG approach we study its signatures observable in the Andreev (particle-to-hole conversion) tunneling spectroscopy. We find, that the leaking Majorana mode has a spin-selective influence on the subgap Kondo effect.

16 pages, 17 figures

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Cited by in corpus (21)

• Majorana-Kondo interplay in T-shaped double quantum dots
• Manipulating Majorana zero modes in double quantum dots
• Robustness of the Kondo effect in a quantum dot coupled to Majorana zero modes
• Generalized atomic limit of a double quantum dot coupled to superconducting leads
• Majorana mode leaking into a spin-charge entangled double quantum dot
• Majorana zero modes in Y-shape interacting Kitaev wires
• Quantum transport through a quantum dot side-coupled to a Majorana bound state pair in the presence of electron-phonon interaction
• Leakage of Majorana mode into correlated quantum dot nearby its singlet-doublet crossover
• Topological isoconductance signatures in Majorana nanowires
• Anomalous Fano Resonance in Double Quantum Dot System Coupled to Superconductor
• Probing Majorana zero modes by measuring transport through an interacting magnetic impurity
• Delocalisation of Majorana quasiparticles in plaquette--nanowire hybrid system
• Transient effects in quantum dots contacted via topological superconductor
• Nonlocal correlations transmitted between quantum dots via short topological superconductor
• Bath-induced decoherence in finite-size Majorana wires at non-zero temperature
• Transport properties of proximitized double quantum dots
• Spin-Exchange Induced Spillover on Poor Man's Majoranas in Minimal Kitaev Chains
• Fractionalization of Majorana-Ising-type quasiparticles
• Properties of multiterminal superconducting nanostructure with double quantum dot
• Continuous unitary transformation approach to the Kondo-Majorana interplay
• Majorana coupling and Kondo screening of localized spins