Comparison of Coulomb Blockade Thermometers with the International Temperature Scale PLTS-2000
Comparison of Coulomb Blockade Thermometers with the International Temperature Scale PLTS-2000
复制标题
库仑封锁温度计与国际温标PLTS-2000的比较
DOI：
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发表时间：
2010
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：
M. Meschke;J. Engert;D. Heyer;J. Pekola
初级库仑阻塞温度计（CBT）的工作是基于测量正常金属电极之间隧道结阵列的偏置电压相关电导。本文报道了CBT与PLTS-2000在0.008 K至0.65 K范围内的高精度实现的比较。在高于0.25 K的温度下，两者的总体一致性约为1%。对于较低的温度，由于CBT与周围环境没有达到完全的热平衡，差异增大。这可以通过基于电子-声子去耦的数值计算来解释。
The operation of the primary Coulomb blockade thermometer (CBT) is based on a measurement of the bias-voltage-dependent conductance of arrays of tunnel junctions between normal metal electrodes. Here, a comparison of a CBT with a high-accuracy realization of the PLTS-2000 in the range from 0.008 K to 0.65 K is reported. An overall agreement of about 1 % was found for temperatures above 0.25 K. For lower temperatures, differences increase because the CBT does not reach full thermal equilibrium with its surroundings. This can be accounted for by numerical calculations based on electron–phonon decoupling.