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Quantum interference and nonequilibrium josephson currents in molecular andreev interferometers

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Quantum interference and nonequilibrium josephson currents in molecular andreev interferometers. / Plaszkó, N.L.; Rakyta, P.; Cserti, J.; Kormányos, A.; Lambert, C.J.

In: Nanomaterials, Vol. 10, No. 6, 1033, 28.05.2020.

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Plaszkó, NL, Rakyta, P, Cserti, J, Kormányos, A & Lambert, CJ 2020, 'Quantum interference and nonequilibrium josephson currents in molecular andreev interferometers', Nanomaterials, vol. 10, no. 6, 1033. https://doi.org/10.3390/nano10061033

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Plaszkó, N.L. ; Rakyta, P. ; Cserti, J. ; Kormányos, A. ; Lambert, C.J. / Quantum interference and nonequilibrium josephson currents in molecular andreev interferometers. In: Nanomaterials. 2020 ; Vol. 10, No. 6.

Bibtex

@article{a111bb1f110c4d31b60fb6e38c362a9b,
title = "Quantum interference and nonequilibrium josephson currents in molecular andreev interferometers",
abstract = "We study the quantum interference (QI) effects in three-terminal Andreev interferometers based on polyaromatic hydrocarbons (PAHs) under non-equilibrium conditions. The Andreev interferometer consists of a PAH coupled to two superconducting and one normal conducting terminals. We calculate the current measured in the normal lead as well as the current between the superconducting terminals under non-equilibrium conditions. We show that both the QI arising in the PAH cores and the bias voltage applied to a normal contact have a fundamental effect on the charge distribution associated with the Andreev Bound States (ABSs). QI can lead to a peculiar dependence of the normal current on the superconducting phase difference that was not observed in earlier studies of mesoscopic Andreev interferometers. We explain our results by an induced asymmetry in the spatial distribution of the electron-and hole-like quasiparticles. The non-equilibrium charge occupation induced in the central PAH core can result in a π transition in the current-phase relation of the supercurrent for large enough applied bias voltage on the normal lead. The asymmetry in the spatial distribution of the electron-and hole-like quasiparticles might be used to split Cooper pairs and hence to produce entangled electrons in four terminal setups. {\textcopyright} 2020 by the authors. Licensee MDPI, Basel, Switzerland.",
keywords = "Cooper pair splitting, Molecular electronics, Quantum interference, Superconductivity",
author = "N.L. Plaszk{\'o} and P. Rakyta and J. Cserti and A. Korm{\'a}nyos and C.J. Lambert",
year = "2020",
month = may,
day = "28",
doi = "10.3390/nano10061033",
language = "English",
volume = "10",
journal = "Nanomaterials",
issn = "2079-4991",
publisher = "MDPI AG",
number = "6",

}

RIS

TY - JOUR

T1 - Quantum interference and nonequilibrium josephson currents in molecular andreev interferometers

AU - Plaszkó, N.L.

AU - Rakyta, P.

AU - Cserti, J.

AU - Kormányos, A.

AU - Lambert, C.J.

PY - 2020/5/28

Y1 - 2020/5/28

N2 - We study the quantum interference (QI) effects in three-terminal Andreev interferometers based on polyaromatic hydrocarbons (PAHs) under non-equilibrium conditions. The Andreev interferometer consists of a PAH coupled to two superconducting and one normal conducting terminals. We calculate the current measured in the normal lead as well as the current between the superconducting terminals under non-equilibrium conditions. We show that both the QI arising in the PAH cores and the bias voltage applied to a normal contact have a fundamental effect on the charge distribution associated with the Andreev Bound States (ABSs). QI can lead to a peculiar dependence of the normal current on the superconducting phase difference that was not observed in earlier studies of mesoscopic Andreev interferometers. We explain our results by an induced asymmetry in the spatial distribution of the electron-and hole-like quasiparticles. The non-equilibrium charge occupation induced in the central PAH core can result in a π transition in the current-phase relation of the supercurrent for large enough applied bias voltage on the normal lead. The asymmetry in the spatial distribution of the electron-and hole-like quasiparticles might be used to split Cooper pairs and hence to produce entangled electrons in four terminal setups. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

AB - We study the quantum interference (QI) effects in three-terminal Andreev interferometers based on polyaromatic hydrocarbons (PAHs) under non-equilibrium conditions. The Andreev interferometer consists of a PAH coupled to two superconducting and one normal conducting terminals. We calculate the current measured in the normal lead as well as the current between the superconducting terminals under non-equilibrium conditions. We show that both the QI arising in the PAH cores and the bias voltage applied to a normal contact have a fundamental effect on the charge distribution associated with the Andreev Bound States (ABSs). QI can lead to a peculiar dependence of the normal current on the superconducting phase difference that was not observed in earlier studies of mesoscopic Andreev interferometers. We explain our results by an induced asymmetry in the spatial distribution of the electron-and hole-like quasiparticles. The non-equilibrium charge occupation induced in the central PAH core can result in a π transition in the current-phase relation of the supercurrent for large enough applied bias voltage on the normal lead. The asymmetry in the spatial distribution of the electron-and hole-like quasiparticles might be used to split Cooper pairs and hence to produce entangled electrons in four terminal setups. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

KW - Cooper pair splitting

KW - Molecular electronics

KW - Quantum interference

KW - Superconductivity

U2 - 10.3390/nano10061033

DO - 10.3390/nano10061033

M3 - Journal article

VL - 10

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 6

M1 - 1033

ER -