Superior thermal conductivity in suspended bilayer hexagonal boron nitride

Abstract

We reported the basal-plane thermal conductivity in exfoliated bilayer hexagonal boron nitride h-BN that was measured using suspended prepatterned microstructures. The h-BN sample suitable for thermal measurements was fabricated by dry-transfer method, whose sample quality, due to less polymer residues on surfaces, is believed to be superior to that of PMMA-mediated samples. The measured room temperature thermal conductivity is around 484 Wm-1K-1(+141 Wm-1K-1/ -24 Wm-1K-1) which exceeds that in bulk h-BN, providing experimental observation of the thickness-dependent thermal conductivity in suspended few-layer h-BN.

arXiv comment10 pages, 3 figures

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• Electrical and thermal transport in coplanar polycrystalline graphene-hBN heterostructures
• Measuring the thermal conductivity and interfacial thermal resistance of suspended MoS2 using electron beam self-heating technique
• Thermal conduction across a boron nitride and silicon oxide interface
• Heat transport in pristine and polycrystalline single-layer hexagonal boron nitride
• Assessment on Thermal Transport Properties of Group-III Nitrides: A Classical Molecular Dynamics Study with Transferable Tersoff Type Inter-atomic Potentials
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• Thermal transport in semiconductor nanostructures, graphene and related two-dimensional materials
• Phonon anharmonicity and thermal conductivity of two-dimensional van der Waals materials: A review
• Reduction of self-heating effects in GaN HEMT via h-BN passivation and lift-off transfer to diamond substrate: a simulation study
• Application-Driven Synthesis and Characterization of Hexagonal Boron Nitride on Metal and Carbon Nanotube Substrates