Constructive influence of the induced electron pairing on the Kondo state

Abstract

Superconductivity and magnetism are usually the conflicting (competing) phenomena. We show, however, that in nanoscopic objects the electron pairing may promote the magnetic ordering. Such situation is possible at low temperatures in the quantum dots placed between the conducting and superconducting reservoirs, where the proximity induced electron pairing cooperates with the correlations enhancing the spin-exchange interactions. The emerging Kondo resonance, which is observable in the Andreev conductance, can be significantly enhanced by the coupling to superconducting lead. We explain this intriguing tendency within the Anderson impurity model using: the generalized Schrieffer-Wolff canonical transformation, the second order perturbative treatment of the Coulomb repulsion, and the nonperturbative numerical renormalization group calculations. We also provide hints for experimental observability of this phenomenon.

arXiv comment11 pages, 8 figures

References in corpus (34)

• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Kondo Physics in a Single Electron Transistor
• Observation of Majorana Fermions in Ferromagnetic Atomic Chains on a Superconductor
• A Tunable Kondo Effect in Quantum Dots
• The numerical renormalization group method for quantum impurity systems
• Spin-resolved Andreev levels and parity crossings in hybrid superconductor-semiconductor nanostructures
• End states and subgap structure in proximity-coupled chains of magnetic adatoms
• Zero-bias anomaly in a nanowire quantum dot coupled to superconductors
• Josephson and Andreev transport through quantum dots
• Energy resolution and discretization artefacts in the numerical renormalization group
• Josephson Current through a correlated quantum level: Andreev states and Pi-junction behavior
• Self-consistent description of Andreev bound states in Josephson quantum dot devices
• Tunneling Spectroscopy of Quasiparticle Bound States in a Spinful Josephson Junction
• Josephson current through a single Anderson impurity coupled to BCS leads
• The Interacting Impurity Josephson Junction: Variational Wavefunctions and Slave Boson Mean Field Theory
• Kondo effect in Normal-Superconductor Quantum Dots
• Shiba states and zero-bias anomalies in the hybrid normal-superconductor Anderson model
• Andreev Scattering and the Kondo Effect
• Non-local spectroscopy of Andreev bound states
• Numerical Renormalization Group Approach to a Quantum Dot Coupled to Normal and Superconducting Leads
• Interplay of Kondo and superconducting correlations in the nonequilibrium Andreev transport through a quantum dot
• Andreev tunnelling in quantum dots: A slave-boson approach
• Electron transport through strongly interacting quantum dot coupled to normal metal and superconductor
• Perturbation theory of a superconducting $0-\pi$ impurity quantum phase transition
• Kondo-resonance, Coulomb blockade, and Andreev transport through a quantum dot
• Proximity effect on spin-dependent conductance and thermopower of correlated quantum dots
• Nonequilibrium transport via spin-induced sub-gap states in superconductor/quantum dot/normal metal cotunnel junctions
• From Andreev bound states to Majorana fermions in topological wires on superconducting substrates : a story of mutation
• Observation of Andreev bound states at spin-active interfaces
• Renormalization effects in interacting quantum dots coupled to superconducting leads
• Manual for the Flexible DM-NRG code
• Quantum Monte Carlo study of nonequilibrium transport through a quantum dot coupled to normal and superconducting leads
• Kondo screening of Andreev bound states in an N-QD-S system
• Tunable "Doniach Phase Diagram" for strongly-correlated nanoclusters

Cited by in corpus (32)

• Kondo and Majorana signatures near the singlet-doublet quantum phase transition
• Josephson-phase-controlled interplay between correlation effects and electron pairing in a three-terminal nanostructure
• Spin-resolved interference due to Majorana state on interface between normal and superconducting leads
• Dynamical quantum phase transitions in a mesoscopic superconducting system
• Spectral and transport properties of a half-filled Anderson impurity coupled to phase-biased superconducting and metallic leads
• Kondo physics in double quantum dot based Cooper pair splitters
• Current cross-correlations and waiting time distributions in Andreev transport through Cooper pair splitters based on triple quantum dots
• How long does it take to form the Andreev quasiparticles ?
• Kondo screening of Andreev bound states in an N-QD-S system
• Interplay between electron pairing and Dicke effect in triple quantum dots structures
• Splitting efficiency and interference effects in a Cooper pair splitter based on a triple quantum dot with ferromagnetic contacts
• Anomalous Fano Resonance in Double Quantum Dot System Coupled to Superconductor
• Quench dynamics of correlated quantum dot proximitized to superconducting lead
• Interplay of the Kondo effect with the induced pairing in electronic and caloric properties of T-shaped double quantum dots
• Temperature Induced Shifts of Yu-Shiba-Rusinov Resonances in Nanowire-Based Hybrid Quantum Dots
• Nonlocal Andreev Reflections as a Source of Spin Exchange and Kondo Screening
• Nonequilibrium Kondo effect by equilibrium numerical renormalization group method: The hybrid Anderson model subject to a finite spin bias
• Transient dynamics of a magnetic impurity coupled to superconducting electrodes: exact numerics versus perturbation theory
• Inelastic Kondo-Andreev tunnelings in a vibrating quantum dot
• Rashba induced Kondo screening of a magnetic impurity in two-dimensional superconductor
• Influence of assisted hopping interaction on the linear conductance of quantum dot
• Statistical correlations of currents flowing via proximized quantum dot
• Transient effects in quantum dots contacted via topological superconductor
• Signatures of Kondo-Majorana interplay in ac response
• Nonlocal Andreev transport through a quantum dot in a magnetic field: Interplay between Kondo, Zeeman, and Cooper-pair correlations
• Strongly correlated electrons in superconducting islands with fluctuating Cooper pairs
• Nonequilibrium Kondo-vs-RKKY Scenarios in Nanoclusters
• Transport properties of proximitized double quantum dots
• Interplay between pairing and correlations in spin-polarized bound states
• Giant superconducting proximity effect on spintronic anisotropy
• Properties of multiterminal superconducting nanostructure with double quantum dot
• Transient triplet blockade in Andreev junction