Tunnel-Junction Thermometry Down to Millikelvin Temperatures
Tunnel-Junction Thermometry Down to Millikelvin Temperatures
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DOI：
10.1103/physrevapplied.4.034001
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发表时间：
2015-09-03
影响因子：
4.6
通讯作者：
Zumbuehl, D. M.
中科院分区：
文献类型：
--
作者：
Feshchenko, A. V.;Casparis, L.;Zumbuehl, D. M.
我们提出了一个简单的芯片上的电子温度计的潜力，工作低至1 mK。它是基于通过一个单一的正常金属超导体隧道结快速加宽的铅运输。通过结的电流由正常电极的温度决定，正常电极有效地热化到声子浴，并且它实际上对超导体的温度不敏感，即使当后者相对远离平衡时。我们在这里演示的操作设备下降到7 mK，并提出了系统的热分析。
We present a simple on-chip electronic thermometer with the potential to operate down to 1 mK. It is based on transport through a single normal-metal-superconductor tunnel junction with rapidly widening leads. The current through the junction is determined by the temperature of the normal electrode that is efficiently thermalized to the phonon bath, and it is virtually insensitive to the temperature of the superconductor, even when the latter is relatively far from equilibrium. We demonstrate here the operation of the device down to 7 mK and present a systematic thermal analysis.