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arXiv 1708.09491cond-mat.mes-hall
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库仑阻塞温度计的开关式芯片冷却低至2.8 mK

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

M. Palma, C. P. Scheller, D. Maradan, A. V. Feshchenko, M. Meschke, D. M. Zumbühl

摘要:

将纳米电子器件冷却到10 mK以下是一个巨大的挑战,因为热导率变得非常小,从而对热泄漏产生明显的敏感性。在这里,我们克服了这些困难,通过使用绝热退磁的\emph{both}电子引线\emph{and}的大金属岛的库仑阻塞温度计。这减少了通过引线的外部热泄漏,还提供了片上制冷,一起将温度计冷却到2.8 $\pm$ 0.1 mK。我们提出了一个热模型,给出了一个很好的定性说明,并建议,主要的限制是加热由于脉冲管振动。通过更好的去耦,低于1 mK的温度应该可以达到,从而为微开尔文纳米电子学打开大门。

英文摘要:

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 \emph{both} the electronic leads \emph{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$\pm$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 microkelvin nanoelectronics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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