Influence of temperature gradients on tunnel junction thermometry below 1 K: cooling and electron-phonon coupling

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dc.creatorKarvonen, J. T.
dc.creatorTaskinen, L. J.
dc.creatorMaasilta, I. J.
dc.date2006-07-31
dc.date2006-12-19
dc.date.accessioned2026-07-07T07:42:33Z
dc.date.available2026-07-07T07:42:33Z
dc.descriptionWe have studied thermal gradients in thin Cu and AlMn wires, both experimentally and theoretically. In the experiments, the wires were Joule heated non-uniformly at sub-Kelvin temperatures, and the resulting temperature gradients were measured using normal metal-insulator-superconducting tunnel junctions. The data clearly shows that even in reasonably well conducting thin wires with a short ($\sim 10 μ$m) non-heated portion, significant temperature differences can form. In most cases, the measurements agree well with a model which includes electron-phonon interaction and electronic thermal conductivity by the Wiedemann-Franz law.
dc.descriptionJ. Low Temp. Phys. in press
dc.identifierhttps://arxiv.org/abs/cond-mat/0607809
dc.identifierhttp://arxiv.org/abs/cond-mat/0607809
dc.identifierJ. Low Temp. Phys. 146, 213 (2007)
dc.identifierdoi:10.1007/s10909-006-9264-y
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/122484
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.titleInfluence of temperature gradients on tunnel junction thermometry below 1 K: cooling and electron-phonon coupling
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