Nanoelectronic primary thermometry below 4 mK

D.I. Bradley, R.E. George, D. Gunnarsson, R.P. Haley, H. Heikkinen, Y.A.a Pashkin, J. Penttila, J.R. Prance (Corresponding Author), M. Prunnila, L. Roschier (Corresponding Author), M. Sarsby

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)

Abstract

Cooling nanoelectronic structures to millikelvin temperatures presents extreme challenges in maintaining thermal contact between the electrons in the device and an external cold bath. It is typically found that when nanoscale devices are cooled to ~ 10mK the electrons are significantly overheated. Here we report the cooling of electrons in nanoelectronic Coulomb blockade thermometers below 4 mK. The low operating temperature is attributed to an optimized design that incorporates cooling fins with a high electron-phonon coupling and on-chip electronic filters, combined with low-noise electronic measurements. By immersing a Coulomb blockade thermometer in the 3He/4He refrigerant of a dilution refrigerator, we measure a lowest electron temperature of 3.7mK and a trend to a saturated electron temperature approaching 3 mK. This work demonstrates how nanoelectronic samples can be cooled further into the low-millikelvin range.
Original languageEnglish
Article number10455
JournalNature Communications
Volume7
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

Fingerprint

Thermometry
Nanoelectronics
temperature measurement
Electrons
Coulomb blockade
Thermometers
Electron temperature
thermometers
Cooling
cooling fins
electronic filters
Temperature
electrons
chips (electronics)
electron energy
cooling
Fins (heat exchange)
refrigerants
Refrigerators
refrigerators

Keywords

  • Molecular electronics
  • Nanoscience and technology

Cite this

Bradley, D. I., George, R. E., Gunnarsson, D., Haley, R. P., Heikkinen, H., Pashkin, Y. A. A., ... Sarsby, M. (2016). Nanoelectronic primary thermometry below 4 mK. Nature Communications, 7, [10455]. https://doi.org/10.1038/ncomms10455
Bradley, D.I. ; George, R.E. ; Gunnarsson, D. ; Haley, R.P. ; Heikkinen, H. ; Pashkin, Y.A.a ; Penttila, J. ; Prance, J.R. ; Prunnila, M. ; Roschier, L. ; Sarsby, M. / Nanoelectronic primary thermometry below 4 mK. In: Nature Communications. 2016 ; Vol. 7.
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Bradley, DI, George, RE, Gunnarsson, D, Haley, RP, Heikkinen, H, Pashkin, YAA, Penttila, J, Prance, JR, Prunnila, M, Roschier, L & Sarsby, M 2016, 'Nanoelectronic primary thermometry below 4 mK', Nature Communications, vol. 7, 10455. https://doi.org/10.1038/ncomms10455

Nanoelectronic primary thermometry below 4 mK. / Bradley, D.I.; George, R.E.; Gunnarsson, D.; Haley, R.P.; Heikkinen, H.; Pashkin, Y.A.a; Penttila, J.; Prance, J.R. (Corresponding Author); Prunnila, M.; Roschier, L. (Corresponding Author); Sarsby, M.

In: Nature Communications, Vol. 7, 10455, 2016.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Nanoelectronic primary thermometry below 4 mK

AU - Bradley, D.I.

AU - George, R.E.

AU - Gunnarsson, D.

AU - Haley, R.P.

AU - Heikkinen, H.

AU - Pashkin, Y.A.a

AU - Penttila, J.

AU - Prance, J.R.

AU - Prunnila, M.

AU - Roschier, L.

AU - Sarsby, M.

PY - 2016

Y1 - 2016

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AB - Cooling nanoelectronic structures to millikelvin temperatures presents extreme challenges in maintaining thermal contact between the electrons in the device and an external cold bath. It is typically found that when nanoscale devices are cooled to ~ 10mK the electrons are significantly overheated. Here we report the cooling of electrons in nanoelectronic Coulomb blockade thermometers below 4 mK. The low operating temperature is attributed to an optimized design that incorporates cooling fins with a high electron-phonon coupling and on-chip electronic filters, combined with low-noise electronic measurements. By immersing a Coulomb blockade thermometer in the 3He/4He refrigerant of a dilution refrigerator, we measure a lowest electron temperature of 3.7mK and a trend to a saturated electron temperature approaching 3 mK. This work demonstrates how nanoelectronic samples can be cooled further into the low-millikelvin range.

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Bradley DI, George RE, Gunnarsson D, Haley RP, Heikkinen H, Pashkin YAA et al. Nanoelectronic primary thermometry below 4 mK. Nature Communications. 2016;7. 10455. https://doi.org/10.1038/ncomms10455