Nonequilibrium Transport through a Spinful Quantum Dot with Superconducting Leads

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Nonequilibrium Transport through a Spinful Quantum Dot with Superconducting Leads. / Andersen, Brian Møller; Flensberg, Karsten; Koerting, Verena; Paaske, Jens.

I: Physical Review Letters, Bind 107, Nr. 25, 14.12.2011, s. 256802 .

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Andersen, BM, Flensberg, K, Koerting, V & Paaske, J 2011, 'Nonequilibrium Transport through a Spinful Quantum Dot with Superconducting Leads', Physical Review Letters, bind 107, nr. 25, s. 256802 . https://doi.org/10.1103/PhysRevLett.107.256802

APA

Andersen, B. M., Flensberg, K., Koerting, V., & Paaske, J. (2011). Nonequilibrium Transport through a Spinful Quantum Dot with Superconducting Leads. Physical Review Letters, 107(25), 256802 . https://doi.org/10.1103/PhysRevLett.107.256802

Vancouver

Andersen BM, Flensberg K, Koerting V, Paaske J. Nonequilibrium Transport through a Spinful Quantum Dot with Superconducting Leads. Physical Review Letters. 2011 dec. 14;107(25):256802 . https://doi.org/10.1103/PhysRevLett.107.256802

Author

Andersen, Brian Møller ; Flensberg, Karsten ; Koerting, Verena ; Paaske, Jens. / Nonequilibrium Transport through a Spinful Quantum Dot with Superconducting Leads. I: Physical Review Letters. 2011 ; Bind 107, Nr. 25. s. 256802 .

Bibtex

@article{7e3c365aabbc4d30b6a5654432e54457,
title = "Nonequilibrium Transport through a Spinful Quantum Dot with Superconducting Leads",
abstract = "We study the nonlinear cotunneling current through a spinful quantum dot contacted by two superconducting leads. Applying a general nonequilibrium Green function formalism to an effective Kondo model, we study the rich variation in the IV characteristics with varying asymmetry in the tunnel coupling to source and drain electrodes. The current is found to be carried, respectively, by multiple Andreev reflections in the symmetric limit, and by spin-induced Yu-Shiba-Rusinov bound states in the strongly asymmetric limit. The interplay between these two mechanisms leads to qualitatively different IV characteristics in the crossover regime of intermediate symmetry, consistent with recent experimental observations of negative differential conductance and repositioned conductance peaks in subgap cotunneling spectroscopy.",
author = "Andersen, {Brian M{\o}ller} and Karsten Flensberg and Verena Koerting and Jens Paaske",
year = "2011",
month = dec,
day = "14",
doi = "10.1103/PhysRevLett.107.256802",
language = "English",
volume = "107",
pages = "256802 ",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "25",

}

RIS

TY - JOUR

T1 - Nonequilibrium Transport through a Spinful Quantum Dot with Superconducting Leads

AU - Andersen, Brian Møller

AU - Flensberg, Karsten

AU - Koerting, Verena

AU - Paaske, Jens

PY - 2011/12/14

Y1 - 2011/12/14

N2 - We study the nonlinear cotunneling current through a spinful quantum dot contacted by two superconducting leads. Applying a general nonequilibrium Green function formalism to an effective Kondo model, we study the rich variation in the IV characteristics with varying asymmetry in the tunnel coupling to source and drain electrodes. The current is found to be carried, respectively, by multiple Andreev reflections in the symmetric limit, and by spin-induced Yu-Shiba-Rusinov bound states in the strongly asymmetric limit. The interplay between these two mechanisms leads to qualitatively different IV characteristics in the crossover regime of intermediate symmetry, consistent with recent experimental observations of negative differential conductance and repositioned conductance peaks in subgap cotunneling spectroscopy.

AB - We study the nonlinear cotunneling current through a spinful quantum dot contacted by two superconducting leads. Applying a general nonequilibrium Green function formalism to an effective Kondo model, we study the rich variation in the IV characteristics with varying asymmetry in the tunnel coupling to source and drain electrodes. The current is found to be carried, respectively, by multiple Andreev reflections in the symmetric limit, and by spin-induced Yu-Shiba-Rusinov bound states in the strongly asymmetric limit. The interplay between these two mechanisms leads to qualitatively different IV characteristics in the crossover regime of intermediate symmetry, consistent with recent experimental observations of negative differential conductance and repositioned conductance peaks in subgap cotunneling spectroscopy.

U2 - 10.1103/PhysRevLett.107.256802

DO - 10.1103/PhysRevLett.107.256802

M3 - Journal article

C2 - 22243100

VL - 107

SP - 256802

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 25

ER -

ID: 36141443