A non-invasive electron thermometer based on charge sensing of a quantum dot
A non-invasive electron thermometer based on charge sensing of a quantum dot
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DOI：
10.1063/1.4823703
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发表时间：
2013-09-23
影响因子：
4
通讯作者：
Smith, C. G.
中科院分区：
文献类型：
--
作者：
Mavalankar, A.;Chorley, S. J.;Smith, C. G.
我们提出了一个温度测量方案，通过使用量子点接触探测器监测弱隧道耦合的“温度计”量子点的电荷占据来提取二维电子气的温度。在120和951 mK之间的电子温度的测量精度在最好的情况下优于1 mK，并同意通过电阻温度计测量的晶格温度。温度计是非侵入性的，并且不使电流通过被测量的电子系统。调谐与温度无关，并且该器件在高达5.6T的磁场中具有鲁棒性。(C)2013 AIP Publishing LLC.
We present a thermometry scheme to extract the temperature of a two-dimensional electron gas by monitoring the charge occupation of a weakly tunnel-coupled "thermometer" quantum dot using a quantum point contact detector. Electronic temperatures between 120 and 951 mK are measured with an accuracy of better than 1 mK in the best case, and agree with the lattice temperature measured by a resistance thermometer. The thermometer is non-invasive and does not pass a current through the electron system being measured. The tuning is independent of temperature, and the device is robust in a magnetic field up to 5.6T. (C) 2013 AIP Publishing LLC.