T. Domański

Influence of pair coherence on charge tunneling through a quantum dot connected to a superconducting lead

We analyze the charge transport through a single level quantum dot coupled to a normal and superconducting lead where the electron pairs exist either as the coherent (for temperatures below

In-gap states of a quantum dot coupled between a normal and a superconducting lead

{T}_{c}

Constructive influence of the induced electron pairing on the Kondo state.

) or incoherent objects (in a region

Interplay between direct and crossed Andreev reflections in hybrid nanostructures

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Controlling the bound states in a quantum-dot hybrid nanowire

). Practically, this situation can be encountered using the high

Meservey-Tedrow-Fulde effect in a quantum dot embedded between metallic and superconducting electrodes

{T}_{c}

Upward curvature of the upper critical field in the boson-fermion model

superconducting materials where precursor effects have been observed upon approaching

Effect of on-site Coulomb repulsion on superconductivity in the boson-fermion model

{T}_{c}

Real space inhomogeneities in high temperature superconductors: the perspective of the two-component model

from above. Without restricting to any particular microscopic mechanism, we investigate the qualitative properties of nonequilibrium charge current caused by the electron pair coherence.

Interplay between single-particle and collective features in the boson fermion model

We study the in-gap states of a quantum dot hybridized with one conducting and another superconducting electrode. The proximity effect suppresses the electronic states in the entire subgap regime |ω| < Δ, where Δ denotes the energy gap of the superconductor. The Andreev scattering mechanism can induce, however, some in-gap states whose line-broadening (inverse life-time) is controlled by the hybridization of the quantum dot with the normal electrode. We show that the number of such Andreev bound states is substantially dependent on the competition between the Coulomb repulsion and the induced on-dot pairing. We discuss the signatures of these in-gap states in the tunneling conductance, especially in a low-bias regime.