On-and-off chip cooling of a Coulomb blockade thermometer down to 2.8 mK

On-and-off chip cooling of a Coulomb blockade thermometer down to 2.8 mK
复制标题

库仑封锁温度计的开关芯片冷却低至 2.8 mK

DOI:
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发表时间:
2017
期刊:
影响因子:
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通讯作者:
D. Zumbühl
D. Zumbühl
中科院分区:
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文献类型:
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作者:
Y. B. Kalyoncu;Mario Palma;C. Scheller;D. Maradan;Anna Feshchenko;Matthias Meschke;D. Zumbühl

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冷却10 mK以下的纳米电子器件是一个巨大的挑战,因为热导率变得非常小,因此对热泄漏产生明显的敏感性。在这里,我们克服了这些困难,利用绝热退磁的电子引线和大金属岛的库仑封锁温度计。这减少了通过引线的外部热泄漏,也提供了芯片上的制冷,一起将温度计冷却到2.8±0.1 mK。我们提出了一个热模型,该模型给出了一个很好的定性描述,并表明主要限制是由于脉管振动引起的加热。通过更好的去耦,1 mK以下的温度应该是可以达到的,从而为μK纳米电子学打开了大门。
Cooling nanoelectronic devices below 10 mK is a great challenge since thermal conductivities become very small, thus creating a pronounced sensitivity to heat leaks. Here, we overcome these difficulties by using adiabatic demagnetization of both the electronic leads and the large metallic islands of a Coulomb blockade thermometer. This reduces the external heat leak through the leads and also provides on-chip refrigeration, together cooling the thermometer down to 2.8 ± 0.1 mK. We present a thermal model which gives a good qualitative account and suggests that the main limitation is heating due to pulse tube vibrations. With better decoupling, temperatures below 1 mK should be within reach, thus opening the door for μK nanoelectronics.
纳米电子器件的片上磁冷却
DOI: 10.48550/arxiv.1611.02483
发表时间: 2016
期刊: --
影响因子: --
作者:
Bradley D
通讯作者: Bradley D