Near-field radiative heat transfer between closely spaced graphene and amorphous SiO${}_2$

Abstract

We study the near-field radiative energy transfer between graphene and an amorphous SiO${}_2$ substrate. In comparison with the existing theories of near-field radiative heat transfer our theory takes into account that the free carriers in graphene are moving relative to the substrate with a drift velocity $v$. In this case the heat flux is determined by both thermal and quantum fluctuations. We find that quantum fluctuations give an important contribution to the radiative energy transfer for low temperatures and high electric field (large drift velocities). For nonsuspended graphene the near-field radiative energy transfer gives a significant contribution to the heat transfer, in addition to the contribution from phononic coupling. For suspended graphene (large separation) the corresponding radiative energy transfer coefficient at nanoscale gap is $\sim$ 3 orders of magnitude larger than radiative heat transfer coefficient of the blackbody radiation limit.

4 pages, 2 figures. arXiv admin note: text overlap with arXiv:1112.4912, arXiv:1012.5212, arXiv:1409.0145

References in corpus (6)

• Electric Field Effect in Atomically Thin Carbon Films
• The structure of suspended graphene sheets
• Intrinsic and Extrinsic Performance Limits of Graphene Devices on SiO2
• Dielectric function, screening, and plasmons in 2D graphene
• Dynamical polarization of graphene at finite doping
• Frictional drag between quantum wells mediated by fluctuating electromagnetic field

Cited by in corpus (12)

• Near-field Radiative Heat Transfer in Many-Body Systems
• Cooling of photoexcited carriers in graphene by internal and substrate phonons
• Ultrafast Radiative Heat Transfer
• Tuning the electromagnetic local density of states in graphene-covered systems via strong coupling with graphene plasmons
• Theory of substrate-directed heat dissipation for single-layer graphene and other two-dimensional crystals
• Near-field energy transfer between graphene and magneto-optic media
• Smart thermal management with near-field thermal radiation
• Near-field thermal transport between twisted bilayer graphene
• Enhancing Near-Field Heat Transfer in Composite Media: Effects of the Percolation Transition
• Extreme near-field heat transfer between silica surfaces
• Radiative heat transfer as a Landauer-Büttiker problem
• Current-induced near-field radiative energy, linear-momentum, and angular-momentum transfer