Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Emma Mykkänen"'
Autor:
Emma Mykkänen, Arijit Bera, Janne S. Lehtinen, Alberto Ronzani, Katja Kohopää, Teresa Hönigl-Decrinis, Rais Shaikhaidarov, Sebastian E. de Graaf, Joonas Govenius, Mika Prunnila
Publikováno v:
Nanomaterials, Vol 10, Iss 5, p 950 (2020)
We have used focused ion beam irradiation to progressively cause defects in annealed molybdenum silicide thin films. Without the treatment, the films are superconducting with critical temperature of about 1 K. We observe that both resistivity and cri
Externí odkaz:
https://doaj.org/article/b3fe9e14051444f39f7fe5eebbd42b82
Autor:
J. Muhojoki, E. T. Mannila, Joonas T. Peltonen, Mika Prunnila, Bayan Karimi, J. S. Lehtinen, N. Yurttagul, M. Gramich, Antti Manninen, Jukka P. Pekola, Ossi Hahtela, Antti Kemppinen, Emma Mykkänen, F. Blanchet
Publikováno v:
Hahtela, O M, Kemppinen, A, Lehtinen, J, Manninen, A J, Mykkänen, E, Prunnila, M, Yurttagul, N, Blanchet, F, Gramich, M, Karimi, B, Mannila, E T, Muhojoki, J, Peltonen, J T & Pekola, J P 2020, Coulomb Blockade Thermometry on a Wide Temperature Range . in 2020 Conference on Precision Electromagnetic Measurements, CPEM 2020 . IEEE Institute of Electrical and Electronic Engineers, pp. 1-2, 2020 Conference on Precision Electromagnetic Measurements, CPEM 2020, Virtual, Denver, United States, 24/08/20 . https://doi.org/10.1109/CPEM49742.2020.9191726
The Coulomb Blockade Thermometer (CBT) is a primary thermometer for cryogenic temperatures, with demonstrated operation from below 1 mK up to 60 K. Its performance as a primary thermometer has been verified at temperatures from 20 mK to 200 mK at unc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11a0e42abfc88d6d21ee37b73e997dd9
http://arxiv.org/abs/2101.03932
http://arxiv.org/abs/2101.03932
Autor:
Mika Prunnila, Antti Manninen, Andrey Timofeev, Andrey Shchepetov, Emma Mykkänen, Antti Kemppinen, J. S. Lehtinen, Leif Grönberg, David Gunnarsson
Publikováno v:
Mykkänen, E, Lehtinen, J S, Grönberg, L, Shchepetov, A, Timofeev, A V, Gunnarsson, D, Kemppinen, A, Manninen, A J & Prunnila, M 2020, ' Thermionic junction devices utilizing phonon blocking ', Science advances, vol. 6, no. 15, eaax9191 . https://doi.org/10.1126/sciadv.aax9191
Science Advances
SCIENCE ADVANCES 10 Apr 2020 Vol 6, Issue 15
Science Advances
SCIENCE ADVANCES 10 Apr 2020 Vol 6, Issue 15
Controlling electron and phonon flows through a solid junction enables novel on-chip cooling and sensing functionalities.
Electrothermal elements are used in various energy harvesters, coolers, and radiation detectors. The optimal operation of t
Electrothermal elements are used in various energy harvesters, coolers, and radiation detectors. The optimal operation of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::110eb04941fc5aee64b62d0914b0de9b
https://cris.vtt.fi/en/publications/7f611126-9a8f-4f9d-b3e7-4417397f80d4
https://cris.vtt.fi/en/publications/7f611126-9a8f-4f9d-b3e7-4417397f80d4
Autor:
Emma Mykkänen, Leif Roschier, Ossi Hahtela, Mika Prunnila, Jukka P. Pekola, Matthias Meschke, Jari Penttilä, Antti Kemppinen, David Gunnarsson
Publikováno v:
Hahtela, O, Mykkänen, E, Kemppinen, A, Meschke, M, Prunnila, M, Gunnarsson, D, Roschier, L, Penttilä, J & Pekola, J 2017, ' Traceable Coulomb blockade thermometry ', Metrologia, vol. 54, no. 1, pp. 69-76 . https://doi.org/10.1088/1681-7575/aa4f84
We present a measurement and analysis scheme for determining traceable thermodynamic temperature at cryogenic temperatures using Coulomb blockade thermometry. The uncertainty of the electrical measurement is improved by utilizing two sampling digital
Autor:
Pekka Immonen, Gento Yamahata, Stephen P. Giblin, Akira Fujiwara, Máté Jenei, Antti Kemppinen, Masaya Kataoka, Mikko Möttönen, Antti Manninen, Emma Mykkänen
Publikováno v:
Giblin, S P, Mykkänen, E, Kemppinen, A, Immonen, P, Manninen, A, Jenei, M, Möttönen, M, Yamahata, G, Fujiwara, A & Kataoka, M 2020, ' Realisation of a quantum current standard at liquid helium temperature with sub-ppm reproducibility ', Metrologia, vol. 57, no. 2, 025013 . https://doi.org/10.1088/1681-7575/ab72e0
A silicon electron pump operating at the temperature of liquid helium has demonstrated repeatable operation with sub-ppm accuracy. The pump current, approximately 168 pA, is measured by three laboratories, and the measurements agree with the expected
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::59163a5d3094d14e8e5ebe29e2383239
Autor:
Leif Grönberg, Mika Prunnila, Andrey Timofeev, A. Kemppinen, Antti Manninen, Emma Mykkänen, David Gunnarsson, Andrey Shchepetov, J. S. Lehtinen
Publikováno v:
Kemppinen, A, Mykkänen, E, Lehtinen, J, Shchepetov, A, Timofeev, A, Gunnarsson, D, Grönberg, L, Manninen, A & Prunnila, M 2018, Methods for Electrical Cooling and Thermometry of a Suspended Silicon Chip . in CPEM 2018-Conference on Precision Electromagnetic Measurements . IEEE Institute of Electrical and Electronic Engineers, Conference on Precision Electromagnetic Measurements, CPEM 2018, Paris, France, 8/07/18 . https://doi.org/10.1109/CPEM.2018.8500953
We suspend a heavily doped conducting silicon chip by tunnel junctions and aluminum leads, which permits the measurement and control of electrical and phonon heat fluxes. Experiments and analysis on heat conduction and electrical cooling utilize tech
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d5030b9d40b1ced60dba54577b781843
https://doi.org/10.1109/CPEM.2018.8500953
https://doi.org/10.1109/CPEM.2018.8500953
Publikováno v:
Lehtinen, J, Mykkänen, E, Kemppinen, A, Prunnila, M & Manninen, A 2018, Fabrication and Studies of Silicide-Based Superconducting Nanowires . in CPEM 2018-Conference on Precision Electromagnetic Measurements . IEEE Institute of Electrical and Electronic Engineers, Conference on Precision Electromagnetic Measurements, CPEM 2018, Paris, France, 8/07/18 . https://doi.org/10.1109/CPEM.2018.8501121
Several silicide compounds are promising materials for studies and applications of quantum phase slips (QPS) in superconducting nanowires (SNWs). This paper describes two nanofabrication processes, which were applied to manufacture silicide SNWs. Exp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::770f487821fb9a586e845d86e17e4def
https://cris.vtt.fi/en/publications/619f5f90-7bc8-44b0-bde2-457c779a6518
https://cris.vtt.fi/en/publications/619f5f90-7bc8-44b0-bde2-457c779a6518
Autor:
Martti Heinonen, J. Nissila, Antti Manninen, K. Ojasalo, Mikko Ruoho, Emma Mykkänen, Ossi Hahtela
Publikováno v:
International Journal of Thermophysics. 36:3255-3271
In this work, a measurement system for high-temperature thermal-conductivity measurements has been designed, constructed, and characterized. The system is based on the $$3{\upomega }$$ method which is an ac technique suitable for both bulk and thin-f
Publikováno v:
Lehtinen, J S, Kemppinen, A, Mykkänen, E, Prunnila, M & Manninen, A J 2018, ' Superconducting MoSi nanowires ', Superconductor Science and Technology, vol. 31, no. 1, 015002 . https://doi.org/10.1088/1361-6668/aa954b
Superconductor Science and Technology
Superconductor Science and Technology
We have fabricated disordered superconducting nanowires of molybdenium silicide. A molybdenium nanowire is first deposited on top of silicon, and the alloy is formed by rapid thermal annealing. The method allows tuning of the crystal growth to optimi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a9c577d8d2f1c9ec20cbd4999031269
Autor:
John Saunders, Matthias Meschke, Alexander Kirste, Leif Roschier, Andrew Casey, J. Engert, Aya Shibahara, Mika Prunnila, A. Kemppinen, Emma Mykkänen, L. V. Levitin, Jukka P. Pekola, David Gunnarsson, Ossi Hahtela
Publikováno v:
International Journal of Thermophysics. 37
This paper reports on the results achieved within the European Metrology Research Programme project “Implementing the new kelvin—InK” in the low-temperature range below 1 K. One of the main objectives of the InK project was the determination of