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Active Quasiparticle Suppression in a Non-Equilibrium Superconductor
[Image: see text] Quasiparticle (qp) poisoning is a major issue that impairs the operation of various superconducting devices. Even though these devices are often operated at temperatures well below the critical point where the number density of excitations is expected to be exponentially suppressed...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7467774/ https://www.ncbi.nlm.nih.gov/pubmed/32551699 http://dx.doi.org/10.1021/acs.nanolett.0c01264 |
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author | Marín-Suárez, Marco Peltonen, Joonas T. Pekola, Jukka P. |
author_facet | Marín-Suárez, Marco Peltonen, Joonas T. Pekola, Jukka P. |
author_sort | Marín-Suárez, Marco |
collection | PubMed |
description | [Image: see text] Quasiparticle (qp) poisoning is a major issue that impairs the operation of various superconducting devices. Even though these devices are often operated at temperatures well below the critical point where the number density of excitations is expected to be exponentially suppressed, their bare operation and stray microwave radiation excite the non-equilibrium qp’s. Here we use voltage-biased superconducting junctions to demonstrate and quantify qp extraction in the turnstile operation of a superconductor–insulator–normal metal–insulator–superconductor single-electron transistor. In this operation regime, excitations are injected into the superconducting leads at a rate proportional to the driving frequency. We reach a reduction of density by an order of magnitude even for the highest injection rate of 2.4 × 10(8) qp’s per second when extraction is turned on. |
format | Online Article Text |
id | pubmed-7467774 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-74677742020-09-03 Active Quasiparticle Suppression in a Non-Equilibrium Superconductor Marín-Suárez, Marco Peltonen, Joonas T. Pekola, Jukka P. Nano Lett [Image: see text] Quasiparticle (qp) poisoning is a major issue that impairs the operation of various superconducting devices. Even though these devices are often operated at temperatures well below the critical point where the number density of excitations is expected to be exponentially suppressed, their bare operation and stray microwave radiation excite the non-equilibrium qp’s. Here we use voltage-biased superconducting junctions to demonstrate and quantify qp extraction in the turnstile operation of a superconductor–insulator–normal metal–insulator–superconductor single-electron transistor. In this operation regime, excitations are injected into the superconducting leads at a rate proportional to the driving frequency. We reach a reduction of density by an order of magnitude even for the highest injection rate of 2.4 × 10(8) qp’s per second when extraction is turned on. American Chemical Society 2020-06-18 2020-07-08 /pmc/articles/PMC7467774/ /pubmed/32551699 http://dx.doi.org/10.1021/acs.nanolett.0c01264 Text en Copyright © 2020 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. |
spellingShingle | Marín-Suárez, Marco Peltonen, Joonas T. Pekola, Jukka P. Active Quasiparticle Suppression in a Non-Equilibrium Superconductor |
title | Active Quasiparticle
Suppression in a Non-Equilibrium
Superconductor |
title_full | Active Quasiparticle
Suppression in a Non-Equilibrium
Superconductor |
title_fullStr | Active Quasiparticle
Suppression in a Non-Equilibrium
Superconductor |
title_full_unstemmed | Active Quasiparticle
Suppression in a Non-Equilibrium
Superconductor |
title_short | Active Quasiparticle
Suppression in a Non-Equilibrium
Superconductor |
title_sort | active quasiparticle
suppression in a non-equilibrium
superconductor |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7467774/ https://www.ncbi.nlm.nih.gov/pubmed/32551699 http://dx.doi.org/10.1021/acs.nanolett.0c01264 |
work_keys_str_mv | AT marinsuarezmarco activequasiparticlesuppressioninanonequilibriumsuperconductor AT peltonenjoonast activequasiparticlesuppressioninanonequilibriumsuperconductor AT pekolajukkap activequasiparticlesuppressioninanonequilibriumsuperconductor |