Observation of phonon Poiseuille flow in isotopically-purified graphite ribbons

Abstract

In recent times, the unique collective transport physics of phonon hydrodynamics motivates theoreticians and experimentalists to explore it in micro- and nanoscale and at elevated temperatures. Graphitic materials have been predicted to facilitate hydrodynamic heat transport with their intrinsically strong normal scattering. However, owing to the experimental difficulties and vague theoretical understanding, the observation of phonon Poiseuille flow in graphitic systems remains challenging. In this study, based on a microscale experimental platform and the pertinent occurrence criterion in anisotropic solids, we demonstrate the phonon Poiseuille flow in a 5 μm-wide suspended graphite ribbon with purified 13C isotope concentration. Our observation is well supported by our theoretical model based on a kinetic theory with fully first-principles inputs. Thus, this study paves the way for deeper insight into phonon hydrodynamics and cutting-edge heat manipulating applications.

References in corpus (6)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• The Raman Fingerprint of Graphene
• Probing the Nature of Defects in Graphene by Raman Spectroscopy
• Length-dependent thermal conductivity in suspended single-layer graphene
• Ballistic to diffusive crossover of heat flow in graphene ribbons
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Cited by in corpus (5)

• Imaging heat transport in suspended diamond nanostructures with integrated spin defect thermometers
• Vortices and backflow in hydrodynamic heat transport
• The thermodynamics of CaSiO3 in Earth's lower mantle
• Grain boundary-limited thermal transport in suspended thin graphite across an unexplored thickness regime
• Spatially Mapping Phonon Drag in Ultrascaled 5-nm Silicon Nanowire Field-Effect Transistor Based on a Quantum Hydrodynamic Formalism