Primary Thermometry in the Intermediate Coulomb Blockade Regime
Primary Thermometry in the Intermediate Coulomb Blockade Regime
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中库仑封锁状态下的初级测温
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
J. Pekola
中科院分区：
文献类型：
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作者：
A. Feshchenko;M. Meschke;D. Gunnarsson;M. Prunnila;L. Roschier;J. Penttilä;J. Pekola
我们调查库仑阻塞温度计（CBT）在中间温度制度，其中测量精度提高是可能的，由于差分电导下降的幅度增加。以前的理论结果表明，修正的半宽度和深度的传感器的测量电导下降是必要的，当离开制度的弱库仑阻塞向较低的温度。在目前的工作中，我们通过实验证明，CBT传感器的温度范围可以通过采用这些校正来扩展，而不会影响温度计的主要性质或精度。
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 range of a CBT sensor can be extended by employing these corrections without compromising the primary nature or the accuracy of the thermometer.