Finite-bias Coulomb blockade thermometry
Fuente:
arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866910840653873152 |
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| author | Sedeh, Omid Sharifi Scheller, Christian P. Weldeyesus, Henok Patlatiuk, Taras Gramich, Matthias Pekola, Jukka P. Zumbühl, Dominik M. |
| author_facet | Sedeh, Omid Sharifi Scheller, Christian P. Weldeyesus, Henok Patlatiuk, Taras Gramich, Matthias Pekola, Jukka P. Zumbühl, Dominik M. |
| contents | Coulomb blockade thermometers (CBTs) are versatile and, in principle, primary thermometers operating down to the micro-Kelvin range but bias heating spoils the thermometry and the primary mode. Here, we introduce a method to extract the CBT electron temperature in the presence of heat created by an arbitrary bias voltage, and without assumptions on the heat flow mechanisms. The charging energy is extracted with high precision and without any other knowledge, thus making true primary thermometry possible. The experiment also reveals a subtle dependence of the charging energy on phonon temperature below 100 mK likely due to the amorphous AlO$_x$ tunnel junctions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_15904 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Finite-bias Coulomb blockade thermometry Sedeh, Omid Sharifi Scheller, Christian P. Weldeyesus, Henok Patlatiuk, Taras Gramich, Matthias Pekola, Jukka P. Zumbühl, Dominik M. Applied Physics Mesoscale and Nanoscale Physics Coulomb blockade thermometers (CBTs) are versatile and, in principle, primary thermometers operating down to the micro-Kelvin range but bias heating spoils the thermometry and the primary mode. Here, we introduce a method to extract the CBT electron temperature in the presence of heat created by an arbitrary bias voltage, and without assumptions on the heat flow mechanisms. The charging energy is extracted with high precision and without any other knowledge, thus making true primary thermometry possible. The experiment also reveals a subtle dependence of the charging energy on phonon temperature below 100 mK likely due to the amorphous AlO$_x$ tunnel junctions. |
| title | Finite-bias Coulomb blockade thermometry |
| topic | Applied Physics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2502.15904 |