Nonequilibrium transport through a quantum dot coupled to normal and superconducting leads

@article{Koga2014NonequilibriumTT,
  title={Nonequilibrium transport through a quantum dot coupled to normal and superconducting leads},
  author={Akihisa Koga},
  journal={arXiv: Strongly Correlated Electrons},
  year={2014}
}
  • A. Koga
  • Published 1 October 2013
  • Physics
  • arXiv: Strongly Correlated Electrons
We study the interacting quantum dot coupled to the normal and superconducting leads by means of a continuous-time quantum Monte Carlo method in the Keldysh-Nambu formalism. Deducing the steady current through the quantum dot under a finite voltage, we examine how the gap magnitude in the superconducting lead and the interaction strength at the quantum dot affect transport properties. It is clarified that the Andreev reflection and Kondo effect lead to nonmonotonic behavior in the… 

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References

SHOWING 1-10 OF 32 REFERENCES
Quantum Monte Carlo study of nonequilibrium transport through a quantum dot coupled to normal and superconducting leads
We investigate the nonequilibrium phenomena through the quantum dot coupled to the normal and superconducting leads using a weak-coupling continuous-time Monte Carlo method. Calculating the time
Andreev tunneling in quantum dots: A slave-boson approach
We study a strongly interacting quantum dot connected to a normal and to a superconducting lead. By means of the slave-boson technique we investigate the low temperature regime and discuss electrical
RESONANT ANDREEV TUNNELING IN STRONGLY INTERACTING QUANTUM DOTS
We study resonant Andreev tunneling through a strongly interacting quantum dot connected to a normal and to a superconducting lead. We obtain a formula for the Andreev current and apply it to discuss
Kondo effect in Normal-Superconductor Quantum Dots
We study the transport properties of a quantum dot coupled to a normal and a superconducting lead. The dot is represented by a generalized Anderson model. Correlation effects are taken into account
Kondo resonance in a nanotube quantum dot coupled to a normal and a superconducting lead
We report on electrical transport measurements through a carbon nanotube quantum dot coupled to a normal and a superconducting lead. The ratio of Kondo temperature and superconducting gap
Fano-type interference in quantum dots coupled between metallic and superconducting leads
We analyze the quantum interference effects appearing in the charge current through the double quantum dots coupled in T-shape configuration to an isotropic superconductor and metallic lead. Owing to
Tunneling spectroscopy of Andreev energy levels in a quantum dot coupled to a superconductor.
TLDR
The spectrum of Andreev energy levels, which capture the properties of the two phases, can be detected in transport measurements with a quantum dot strongly coupling to a superconducting lead and weakly coupled to a normal metal lead.
Numerical Renormalization Group Approach to a Quantum Dot Coupled to Normal and Superconducting Leads(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
We study transport through a quantum dot coupled to normal and superconducting leads using the numerical renormalization group method. We show that the low-energy properties of the system are
Andreev scattering and the Kondo effect
We examine the properties of an infinite-$U$ Anderson impurity coupled to both normal and superconducting metals. Both the cases of a quantum dot and a quantum point contact containing an impurity
Interplay of Kondo and superconducting correlations in the nonequilibrium Andreev transport through a quantum dot
Using the modified perturbation theory, we theoretically study the nonequilibrium Andreev transport through a quantum dot coupled to normal and superconducting leads (N-QD-S), which is strongly
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