A. V. Feshchenko, M. Meschke, D. Gunnarsson, M. Prunnila, L. Roschier, J. S. Penttilä, J. P. Pekola
We investigate Coulomb blockade thermometers (CBT) in an intermediate temperature regime, where measurements with enhanced accuracy are possible due to the increased magnitude of the differential conductance dip. Previous theoretical results show that corrections to the half width and to the depth of the measured conductance dip of a sensor are needed, when leaving the regime of weak Coulomb blockade towards lower temperatures. In the present work, we demonstrate experimentally that the temperature of a CBT sensor can be obtained with high accuracy by employing these corrections without compromising the primary nature of the thermometer.
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http://arxiv.org/abs/1206.0548
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