Metallic Coulomb blockade thermometry down to 10 mK and below
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© 2012 AIP Publishing. This is the accepted version of the following article: Casparis, L. & Meschke, M. & Maradan, D. & Clark, A. C. & Scheller, C. P. & Schwarzwälder, K. K. & Pekola, Jukka & Zumbühl, D. M. 2012. Metallic Coulomb blockade thermometry down to 10 mK and below. Review of Scientific Instruments. Volume 83, Issue 8. 083903/1-3. ISSN 0034-6748 (printed). DOI: 10.1063/1.4744944, which has been published in final form at
http://scitation.aip.org/content/aip/journal/rsi/83/8/10.1063/1.4744944
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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083903/1-3
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Review of Scientific Instruments, Volume 83, Issue 8
Abstract
We present an improved nuclear refrigerator reaching 0.3 mK, aimed at microkelvin nanoelectronic experiments, and use it to investigate metallic Coulomb blockadethermometers (CBTs) with various resistances R. The high-R devices cool to slightly lower T, consistent with better isolation from the noise environment, and exhibit electron-phonon cooling ∝ T 5 and a residual heat-leak of 40 aW. In contrast, the low-R CBTs display cooling with a clearly weaker T-dependence, deviating from the electron-phonon mechanism. The CBTs agree excellently with the refrigerator temperature above 20 mK and reach a minimum-T of 7.5 ± 0.2 mK.Description
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Casparis, L. & Meschke, M. & Maradan, D. & Clark, A. C. & Scheller, C. P. & Schwarzwälder, K. K. & Pekola, Jukka & Zumbühl, D. M. 2012. Metallic Coulomb blockade thermometry down to 10 mK and below. Review of Scientific Instruments. Volume 83, Issue 8. 083903/1-3. ISSN 0034-6748 (printed). DOI: 10.1063/1.4744944.