Photon-assisted resonant Andreev reflections: Yu-Shiba-Rusinov and Majorana states

Research output: Contribution to journalJournal articlepeer-review

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Photon-assisted resonant Andreev reflections : Yu-Shiba-Rusinov and Majorana states. / Gonzalez, Sergio Acero; Melischek, Larissa; Peters, Olof; Flensberg, Karsten; Franke, Katharina J.; von Oppen, Felix.

In: Physical Review B, Vol. 102, No. 4, 045413, 10.07.2020.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Gonzalez, SA, Melischek, L, Peters, O, Flensberg, K, Franke, KJ & von Oppen, F 2020, 'Photon-assisted resonant Andreev reflections: Yu-Shiba-Rusinov and Majorana states', Physical Review B, vol. 102, no. 4, 045413. https://doi.org/10.1103/PhysRevB.102.045413

APA

Gonzalez, S. A., Melischek, L., Peters, O., Flensberg, K., Franke, K. J., & von Oppen, F. (2020). Photon-assisted resonant Andreev reflections: Yu-Shiba-Rusinov and Majorana states. Physical Review B, 102(4), [045413]. https://doi.org/10.1103/PhysRevB.102.045413

Vancouver

Gonzalez SA, Melischek L, Peters O, Flensberg K, Franke KJ, von Oppen F. Photon-assisted resonant Andreev reflections: Yu-Shiba-Rusinov and Majorana states. Physical Review B. 2020 Jul 10;102(4). 045413. https://doi.org/10.1103/PhysRevB.102.045413

Author

Gonzalez, Sergio Acero ; Melischek, Larissa ; Peters, Olof ; Flensberg, Karsten ; Franke, Katharina J. ; von Oppen, Felix. / Photon-assisted resonant Andreev reflections : Yu-Shiba-Rusinov and Majorana states. In: Physical Review B. 2020 ; Vol. 102, No. 4.

Bibtex

@article{0819d9d6be0e45cca0a28aeda8193037,
title = "Photon-assisted resonant Andreev reflections: Yu-Shiba-Rusinov and Majorana states",
abstract = "Photon-assisted tunneling frequently provides detailed information on the underlying charge-transfer process. In particular, the Tien-Gordon approach and its extensions predict that the sideband spacing in bias voltage is a direct fingerprint of the number of electrons transferred in a single tunneling event. Here, we analyze photon-assisted tunneling into subgap states in superconductors in the limit of small temperatures and bias voltages where tunneling is dominated by resonant Andreev processes and does not conform to the predictions of simple Tien-Gordon theory. Our analysis is based on a systematic Keldysh calculation of the subgap conductance and provides a detailed analytical understanding of photon-assisted tunneling into subgap states, in excellent agreement with a recent experiment. We focus on tunneling from superconducting electrodes and into Yu-Shiba-Rusinov states associated with magnetic impurities or adatoms, but we also explicitly extend our results to include normal-metal electrodes or other types of subgap states in superconductors. In particular, we argue that photon-assisted Andreev reflections provide a high-accuracy method to measure small but nonzero energies of subgap states which can be important for distinguishing conventional subgap states from Majorana bound states.",
keywords = "GAP STRUCTURE, BOUND-STATES",
author = "Gonzalez, {Sergio Acero} and Larissa Melischek and Olof Peters and Karsten Flensberg and Franke, {Katharina J.} and {von Oppen}, Felix",
year = "2020",
month = jul,
day = "10",
doi = "10.1103/PhysRevB.102.045413",
language = "English",
volume = "102",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "4",

}

RIS

TY - JOUR

T1 - Photon-assisted resonant Andreev reflections

T2 - Yu-Shiba-Rusinov and Majorana states

AU - Gonzalez, Sergio Acero

AU - Melischek, Larissa

AU - Peters, Olof

AU - Flensberg, Karsten

AU - Franke, Katharina J.

AU - von Oppen, Felix

PY - 2020/7/10

Y1 - 2020/7/10

N2 - Photon-assisted tunneling frequently provides detailed information on the underlying charge-transfer process. In particular, the Tien-Gordon approach and its extensions predict that the sideband spacing in bias voltage is a direct fingerprint of the number of electrons transferred in a single tunneling event. Here, we analyze photon-assisted tunneling into subgap states in superconductors in the limit of small temperatures and bias voltages where tunneling is dominated by resonant Andreev processes and does not conform to the predictions of simple Tien-Gordon theory. Our analysis is based on a systematic Keldysh calculation of the subgap conductance and provides a detailed analytical understanding of photon-assisted tunneling into subgap states, in excellent agreement with a recent experiment. We focus on tunneling from superconducting electrodes and into Yu-Shiba-Rusinov states associated with magnetic impurities or adatoms, but we also explicitly extend our results to include normal-metal electrodes or other types of subgap states in superconductors. In particular, we argue that photon-assisted Andreev reflections provide a high-accuracy method to measure small but nonzero energies of subgap states which can be important for distinguishing conventional subgap states from Majorana bound states.

AB - Photon-assisted tunneling frequently provides detailed information on the underlying charge-transfer process. In particular, the Tien-Gordon approach and its extensions predict that the sideband spacing in bias voltage is a direct fingerprint of the number of electrons transferred in a single tunneling event. Here, we analyze photon-assisted tunneling into subgap states in superconductors in the limit of small temperatures and bias voltages where tunneling is dominated by resonant Andreev processes and does not conform to the predictions of simple Tien-Gordon theory. Our analysis is based on a systematic Keldysh calculation of the subgap conductance and provides a detailed analytical understanding of photon-assisted tunneling into subgap states, in excellent agreement with a recent experiment. We focus on tunneling from superconducting electrodes and into Yu-Shiba-Rusinov states associated with magnetic impurities or adatoms, but we also explicitly extend our results to include normal-metal electrodes or other types of subgap states in superconductors. In particular, we argue that photon-assisted Andreev reflections provide a high-accuracy method to measure small but nonzero energies of subgap states which can be important for distinguishing conventional subgap states from Majorana bound states.

KW - GAP STRUCTURE

KW - BOUND-STATES

U2 - 10.1103/PhysRevB.102.045413

DO - 10.1103/PhysRevB.102.045413

M3 - Journal article

VL - 102

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 4

M1 - 045413

ER -

ID: 246729415