Anomalous near-field heat transfer in carbon-based nano-structures with edge states

Abstract

We find an unusually optimal near field heat transfer, where the maximum heat transfer is reached at experimentally feasible gap separation. We attribute this to the localized zero-energy electronic edge states, which also substantially changes the near-field behaviors. We demonstrate these anomalous behaviors in two typical carbon-based nano-structures: zigzag single-walled carbon nanotubes and graphene nano-triangles. For the system of carbon nanotubes, the maximal heat flux in this work surpasses all the previous results reported so far by several orders of magnitude. The underlying mechanisms for the peculiar effects are uncovered from a simple Su-Schrieffer-Heeger model. Our findings also offer a novel route to active near-field thermal switch, where the heat flux can be modulated through tuning the presence or absence of edge states.

arXiv comment5 pages, 4 figures

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• Transport in electron-photon systems
• Modulating near-field thermal transfer through temporal drivings: a quantum many-body theory
• Topological Materials for Near-Field Radiative Heat Transfer
• Residual surface charge mediated near-field radiative energy transfer: A topological insulator analog
• Mechanical relations between conductive and radiative heat transfer
• Generalized first-principles method to study near-field heat transfer mediated by Coulomb interaction
• Non-equilibrium Green's function formalism for radiative heat transfer