Electronic thermal transport measurement in low-dimensional materials with graphene non-local noise thermometry
Electronic thermal transport measurement in low-dimensional materials with graphene non-local noise thermometry
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DOI：
10.1038/s41565-021-01015-x
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发表时间：
2021-01
影响因子：
38.3
通讯作者：
J. Waissman;Laurel Anderson;Artem V. Talanov;Zhongying Yan;Y. Shin;D. Najafabadi;M. Rezaee;
中科院分区：
文献类型：
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作者：
J. Waissman;Laurel Anderson;Artem V. Talanov;Zhongying Yan;Y. Shin;D. Najafabadi;M. Rezaee;
在低维系统中，降维、强相互作用和拓扑结构的结合导致了越来越多的多体量子现象。热输运，这是敏感的所有载能自由度，提供了一个有区别的探针的紧急激发量子材料和设备。然而，在低维的热输运测量主要是由声子贡献的晶格，需要一个实验的方法来隔离的电子热导。在这里，我们测量了非局部电压波动的多端设备，揭示电子热传输通过介观桥由低维材料。使用二维石墨烯作为噪声温度计，我们测量了高达70 K的石墨烯和碳纳米管的定量电子热导，达到了5 K时热导量子的~1%的精度。采用线性和非线性的热传输，我们观察到的签名的能量传输介导的长程相互作用在一维电子系统中，与理论模型一致。
In low-dimensional systems, the combination of reduced dimensionality, strong interactions and topology has led to a growing number of many-body quantum phenomena. Thermal transport, which is sensitive to all energy-carrying degrees of freedom, provides a discriminating probe of emergent excitations in quantum materials and devices. However, thermal transport measurements in low dimensions are dominated by the phonon contribution of the lattice, requiring an experimental approach to isolate the electronic thermal conductance. Here we measured non-local voltage fluctuations in a multi-terminal device to reveal the electronic heat transported across a mesoscopic bridge made of low-dimensional materials. Using two-dimensional graphene as a noise thermometer, we measured the quantitative electronic thermal conductance of graphene and carbon nanotubes up to 70 K, achieving a precision of ~1% of the thermal conductance quantum at 5 K. Employing linear and nonlinear thermal transport, we observed signatures of energy transport mediated by long-range interactions in one-dimensional electron systems, in agreement with a theoretical model.