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On the origin of the controversial electrostatic field effect in superconductors

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On the origin of the controversial electrostatic field effect in superconductors. / Golokolenov, Ilya; Guthrie, Andrew; Kafanov, Sergey; Pashkin, Yuri; Tsepelin, Viktor.

In: Nature Communications, Vol. 12, 2747, 12.05.2021.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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@article{412cda3e1be3446ea0bcc485bbd7ac25,
title = "On the origin of the controversial electrostatic field effect in superconductors",
abstract = "Superconducting quantum devices offer numerous applications, from electrical metrology and magnetic sensing to energy-efficient high-end computing and advanced quantum information processing. The key elements of quantum circuits are (single and double) Josephson junctions controllable either by electric current or magnetic field. The voltage control, commonly used in semiconductor-based devices via the electrostatic field effect, would be far more versatile and practical. Hence, the field effect recently reported in superconducting devices may revolutionise the whole field of superconductor electronics provided it is confirmed. Here we show that the suppression of the critical current attributed to the field effect, can be explained by quasiparticle excitations in the constriction of superconducting devices. Our results demonstrate that a miniscule leakage current between the gate and the constriction of devices perfectly follows the Fowler-Nordheim model of electron field emission from a metal electrode and injects quasiparticles with energies sufficient to weaken or even suppress superconductivity.",
author = "Ilya Golokolenov and Andrew Guthrie and Sergey Kafanov and Yuri Pashkin and Viktor Tsepelin",
year = "2021",
month = may,
day = "12",
doi = "10.1038/s41467-021-22998-0",
language = "English",
volume = "12",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",

}

RIS

TY - JOUR

T1 - On the origin of the controversial electrostatic field effect in superconductors

AU - Golokolenov, Ilya

AU - Guthrie, Andrew

AU - Kafanov, Sergey

AU - Pashkin, Yuri

AU - Tsepelin, Viktor

PY - 2021/5/12

Y1 - 2021/5/12

N2 - Superconducting quantum devices offer numerous applications, from electrical metrology and magnetic sensing to energy-efficient high-end computing and advanced quantum information processing. The key elements of quantum circuits are (single and double) Josephson junctions controllable either by electric current or magnetic field. The voltage control, commonly used in semiconductor-based devices via the electrostatic field effect, would be far more versatile and practical. Hence, the field effect recently reported in superconducting devices may revolutionise the whole field of superconductor electronics provided it is confirmed. Here we show that the suppression of the critical current attributed to the field effect, can be explained by quasiparticle excitations in the constriction of superconducting devices. Our results demonstrate that a miniscule leakage current between the gate and the constriction of devices perfectly follows the Fowler-Nordheim model of electron field emission from a metal electrode and injects quasiparticles with energies sufficient to weaken or even suppress superconductivity.

AB - Superconducting quantum devices offer numerous applications, from electrical metrology and magnetic sensing to energy-efficient high-end computing and advanced quantum information processing. The key elements of quantum circuits are (single and double) Josephson junctions controllable either by electric current or magnetic field. The voltage control, commonly used in semiconductor-based devices via the electrostatic field effect, would be far more versatile and practical. Hence, the field effect recently reported in superconducting devices may revolutionise the whole field of superconductor electronics provided it is confirmed. Here we show that the suppression of the critical current attributed to the field effect, can be explained by quasiparticle excitations in the constriction of superconducting devices. Our results demonstrate that a miniscule leakage current between the gate and the constriction of devices perfectly follows the Fowler-Nordheim model of electron field emission from a metal electrode and injects quasiparticles with energies sufficient to weaken or even suppress superconductivity.

U2 - 10.1038/s41467-021-22998-0

DO - 10.1038/s41467-021-22998-0

M3 - Journal article

VL - 12

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

M1 - 2747

ER -