Low Temperature Characteristics of the Metal–Superconductor NIS Tunneling Thermometer

Bayan Karimi; Yu Cheng Chang; Jukka P. Pekola

doi:10.1007/s10909-022-02713-z

Low Temperature Characteristics of the Metal–Superconductor NIS Tunneling Thermometer

Bayan Karimi^*, Yu Cheng Chang, Jukka P. Pekola

^*Tämän työn vastaava kirjoittaja

University of Helsinki

Tutkimustuotos: Lehtiartikkeli › Article › Scientific › vertaisarvioitu

2 Sitaatiot (Scopus)

63 Lataukset (Pure)

Abstrakti

We discuss the temperature dependence of a common low temperature local thermometer, a tunnel junction between a superconductor and a normal metal (NIS junction). Towards the lowest temperatures its characteristics tend to saturate, which is usually attributed to selfheating effects. In this technical note, we reanalyze this saturation and show that the temperature independent subgap current of the junction alone explains in some cases the low temperature behavior quantitatively.

Alkuperäiskieli	Englanti
Sivut	220-225
Sivumäärä	6
Julkaisu	Journal of Low Temperature Physics
Vuosikerta	207
Numero	3-4
Varhainen verkossa julkaisun päivämäärä	5 huhtik. 2022
DOI - pysyväislinkit	https://doi.org/10.1007/s10909-022-02713-z
Tila	Julkaistu - toukok. 2022
OKM-julkaisutyyppi	A1 Julkaistu artikkeli, soviteltu

Pääsy asiakirjaan

10.1007/s10909-022-02713-zLisenssi: CC BY

Low Temperature Characteristics of the Metal–Superconductor NIS Tunneling ThermometerFinal published version, 709 KBLisenssi: CC BY

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CoE QTF/Pekola
Pekola, J., Blanchet, F., Golubev, D., Maillet, O., Marin Suarez, M., Mannila, E. & Senior, J.
01/01/2018 → 31/12/2020
Projekti: Academy of Finland: Other research funding

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@article{d4a39144ab84436b803cf9aa7af28465,

title = "Low Temperature Characteristics of the Metal–Superconductor NIS Tunneling Thermometer",

abstract = "We discuss the temperature dependence of a common low temperature local thermometer, a tunnel junction between a superconductor and a normal metal (NIS junction). Towards the lowest temperatures its characteristics tend to saturate, which is usually attributed to selfheating effects. In this technical note, we reanalyze this saturation and show that the temperature independent subgap current of the junction alone explains in some cases the low temperature behavior quantitatively.",

keywords = "Dynes parameter, Local thermometry, Low-T saturation, NIS junction",

author = "Bayan Karimi and Chang, {Yu Cheng} and Pekola, {Jukka P.}",

note = "Funding Information: We received funding from the Academy of Finland under Grant 312057. We acknowledge the provision of facilities and technical support by Aalto University at the OtaNano—Micronova Nanofabrication Center and through the low temperature laboratory (LTL) infrastructure, which is part of the EU Horizon 2020 European Microkelvin Platform (EMP), No. 824109. Publisher Copyright: {\textcopyright} 2022, The Author(s).",

year = "2022",

month = may,

doi = "10.1007/s10909-022-02713-z",

language = "English",

volume = "207",

pages = "220--225",

journal = "Journal of Low Temperature Physics",

issn = "0022-2291",

publisher = "SPRINGER",

number = "3-4",

}

TY - JOUR

T1 - Low Temperature Characteristics of the Metal–Superconductor NIS Tunneling Thermometer

AU - Karimi, Bayan

AU - Chang, Yu Cheng

AU - Pekola, Jukka P.

N1 - Funding Information: We received funding from the Academy of Finland under Grant 312057. We acknowledge the provision of facilities and technical support by Aalto University at the OtaNano—Micronova Nanofabrication Center and through the low temperature laboratory (LTL) infrastructure, which is part of the EU Horizon 2020 European Microkelvin Platform (EMP), No. 824109. Publisher Copyright: © 2022, The Author(s).

PY - 2022/5

Y1 - 2022/5

N2 - We discuss the temperature dependence of a common low temperature local thermometer, a tunnel junction between a superconductor and a normal metal (NIS junction). Towards the lowest temperatures its characteristics tend to saturate, which is usually attributed to selfheating effects. In this technical note, we reanalyze this saturation and show that the temperature independent subgap current of the junction alone explains in some cases the low temperature behavior quantitatively.

AB - We discuss the temperature dependence of a common low temperature local thermometer, a tunnel junction between a superconductor and a normal metal (NIS junction). Towards the lowest temperatures its characteristics tend to saturate, which is usually attributed to selfheating effects. In this technical note, we reanalyze this saturation and show that the temperature independent subgap current of the junction alone explains in some cases the low temperature behavior quantitatively.

KW - Dynes parameter

KW - Local thermometry

KW - Low-T saturation

KW - NIS junction

UR - http://www.scopus.com/inward/record.url?scp=85127527328&partnerID=8YFLogxK

U2 - 10.1007/s10909-022-02713-z

DO - 10.1007/s10909-022-02713-z

M3 - Article

AN - SCOPUS:85127527328

VL - 207

SP - 220

EP - 225

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

SN - 0022-2291

IS - 3-4

ER -

Low Temperature Characteristics of the Metal–Superconductor NIS Tunneling Thermometer

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CoE QTF/Pekola

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OtaNano

OtaNano – Kylmälaboratorio

OtaNano Nanofab

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