Transmission of heat modes across a potential barrier.
Transmission of heat modes across a potential barrier.
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DOI：
10.1038/s41467-017-02433-z
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发表时间：
2017-12-21
影响因子：
16.6
通讯作者：
Umansky V
中科院分区：
文献类型：
--
作者：
Rosenblatt A;Lafont F;Levkivskyi I;Sabo R;Gurman I;Banitt D;Heiblum M;Umansky V
利用量子点接触收缩来控制电流的传输为介观物理学中的各种实验铺平了道路。在这样的系统中，热传递的兴趣越来越大，引发了关于不携带净电荷的量子热模式（中性模式）的可能操纵的问题。本文研究了分数空穴共轭量子霍尔态中上游中性模通过量子点接触的传输。采用两种不同的测量技术，我们能够呈现这些不带电模式的相对空间分布与他们的带电同行。在这些国家，这被发现窝藏一个以上的下游充电模式，上游中性模式被发现流动与内部充电模式的理论预测。这些结果揭示了一种通用的上游热流结构，并为量子纳米电子器件中更复杂的热流和冷却机制工程开辟了道路。了解热流的传递，特别是不携带净电荷的中性热模式，是非常有趣的。在这里，作者研究了上游中性模式通过量子点接触的传输，以呈现这些不带电模式的相对空间分布。
Controlling the transmission of electrical current using a quantum point contact constriction paved a way to a large variety of experiments in mesoscopic physics. The increasing interest in heat transfer in such systems fosters questions about possible manipulations of quantum heat modes that do not carry net charge (neutral modes). Here we study the transmission of upstream neutral modes through a quantum point contact in fractional hole-conjugate quantum Hall states. Employing two different measurement techniques, we were able to render the relative spatial distribution of these chargeless modes with their charged counterparts. In these states, which were found to harbor more than one downstream charge mode, the upstream neutral modes are found to flow with the inner charge mode—as theoretically predicted. These results unveil a universal upstream heat current structure and open the path for more complex engineering of heat flows and cooling mechanisms in quantum nano-electronic devices. Understanding the transfer of heat currents, specifically, neutral heat modes which do not carry net charge, is of great interest. Here, the authors study the transmission of upstream neutral modes through a quantum point contact in order to render the relative spatial distribution of these chargeless modes.
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