Electronic Thermal Transport Measurement in Low-Dimensional Materials with Graphene Nonlocal Noise Thermometry

Abstract

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 show how the measurement of nonlocal voltage fluctuations in a multiterminal device can reveal the electronic heat transported across a mesoscopic bridge made of low-dimensional materials. By using 2-dimensional graphene as a noise thermometer, we demonstrate quantitative electronic thermal conductance measurements 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 observe signatures of long-range interaction-mediated energy transport in 1-dimensional electron systems, in agreement with a theoretical model. Our versatile nonlocal noise thermometry allows new experiments probing energy transport in emergent states of matter and devices in low dimensions.

Authors' revision. Main text: 11 pages, 4 figures. Supplementary information: 26 pages, 11 figures. Methods and references included. Published in Nature Nanotechnology

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• Rectification and bolometric terahertz radiation detectors based on perforated graphene structures exhibiting plasmonic resonant response
• Resolving the Corbino Shockley-Ramo Paradox for Hydrodynamic Current Noise
• Thermal properties of the superconductor-quantum Hall interfaces
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• Spin drag mechanism of giant thermal magnetoresistance
• Non-local origin and correlations in the Johnson noise at nonuniform temperatures
• Wiedemann-Franz behavior at the Weyl points in compressively strained HgTe
• An extensive thermal conductivity measurement method based on atomic force microscopy
• Spin-caloric resistance of Dirac plasma in a graphene Corbino device
• Simultaneous measurement of thermal conductivity and specific heat in quasi-two-dimensional membranes using the 3ω method