Anomalous Near-Field Heat Transfer in Carbon-Based Nanostructures with Edge States

Tang, Gaomin; Yap, Han Hoe; Ren, Jie; Wang, Jian‐Sheng

doi:10.1103/physrevapplied.11.031004

Cited by 28 publications

(14 citation statements)

References 54 publications

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“…This Coulomb-type heat transfer has been studied for some systems [28,29,[31][32][33]. However, specific theoretical modeling of density correlation functions is needed for different materials to obtain the transmission coefficient.…”

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confidence: 99%

Generalized first-principles method to study near-field heat transfer mediated by Coulomb interaction

Zhu

Wang

2021

Phys. Rev. B

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We present a first-principles approach to calculate the Coulomb-interaction-mediated heat current in the near field. With the nonequilibrium Green's functions method, the heat flux is calculated from a Landauer formula combining with a Caroli formula of transmission coefficient. The central physical quantities are the screened Coulomb potential and the spectrum function of polarizability. Within the random phase approximation, we calculate the polarizability using the linear response density functional theory and obtain the screened Coulomb potential from a retarded Dyson equation. We adopt single-layer graphene as an example to calculate the Coulomb heat flux between two parallel sheets with different gap sizes. Our results show that the heat flux saturates at the extreme near field with a convergent ratio of 5 × 10 4 to the black-body limit. With increasing distances, the heat flux asymptotically shows a 1/d 2 dependence. From the energy current spectrum, we infer that the near-field enhancement of Coulomb heat flux stem from electron transitions around the Fermi level. Strain effects on the heat flux are also discussed at different distances. We found that the heat flux is positively correlated to the strain for most of the distances while a negative correlation is shown at the near-to-medium field. Our method is general and can be easily applied to various kinds of materials which provides a benchmarking reference for both theory and experiment.

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confidence: 99%

Generalized first-principles method to study near-field heat transfer mediated by Coulomb interaction

Zhu

Wang

2021

Phys. Rev. B

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“…9,61 Furthermore, the derivation of Landauer-like formulas for RHT (33) is generally applicable for linear media even when the susceptibilities V α do not describe harmonic oscillator response functions; our use of harmonic oscillators was for convenience in writing a Lagrangian and explaining salient features through physical intuition. Finally, we emphasize that unlike previous work which has typically depended on highsymmetry geometries and the assumption of the EM near-field regime, 39,40,42,43,45 these derivations are applicable to arbitrary geometries from the near-through far-field regimes.…”

Section: Applications To Rhtmentioning

confidence: 96%

“…4,9,[31][32][33][34] However, recent experiments [35][36][37][38] have yielded conflicting accounts of the nature of heat transfer in the extreme near-field (ranging from subnanometric separations to 10 nm), raising questions about the interplay between conduction and radiation at such small separations. Simultaneously, recent theoretical works 8,[39][40][41][42][43][44][45] have begun to shed light on the connections between the formalisms of conductive (whether electronic or phononic) and radiative heat transfer, but these have typically been subject to restrictions including neglect of electromagnetic retardation and consideration of translationally symmetric systems like planar sheets or slabs. In this paper, we present a unified linear response formalism that can describe phonon conductive heat transfer (PCHT) and radiative heat transfer (RHT) for arbitrary geometries and separations.…”

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confidence: 99%

Mechanical relations between conductive and radiative heat transfer

Venkataram,

Messina,

Cuevas

et al. 2020

Preprint

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We present a general nonequilibrium Green's function formalism for modeling heat transfer in systems characterized by linear response that establishes the formal algebraic relationships between phonon and radiative conduction, and reveals how upper bounds for the former can also be applied to the latter. We also propose an extension of this formalism to treat systems susceptible to the interplay of conductive and radiative heat transfer, which becomes relevant in atomic systems and at nanometric and smaller separations where theoretical descriptions which treat each phenomenon separately may be insufficient. We illustrate the need for such coupled descriptions by providing predictions for a low-dimensional system of carbyne wires in which the total heat transfer can differ from the sum of its radiative and conductive contributions. Our framework has ramifications for understanding heat transfer between large bodies that may approach direct contact with each other or that may be coupled by atomic, molecular, or interfacial film junctions.

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“…Introduction.-Near-field radiative heat transfer (NFRHT) can largely exceed the Planckian limit of black-body radiation [1] due to the contribution from surface electromagnetic modes [2][3][4][5][6][7][8][9][10][11][12] and attracts particular scientific interest triggered by experimental advances [13][14][15][16][17][18][19][20][21][22][23]. For novel applications, it is of importance to actively control NFRHT.…”

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confidence: 99%

Twist-induced control of near-field heat radiation between magnetic Weyl semimetals

2021

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Due to the large anomalous Hall effect, magnetic Weyl semimetals can support nonreciprocal surface plasmon polariton modes in the absence of an external magnetic field. This implies that magnetic Weyl semimetals can find novel application in (thermal) photonics. In this work, we consider the near-field radiative heat transfer between two magnetic Weyl semimetal slabs and show that the heat transfer can be controlled with a relative rotation of the parallel slabs. Thanks to the intrinsic nonreciprocity of the surface modes, this so-called twisting method does not require surface structuring like periodic gratings. The twist-induced control of heat transfer is due to the mismatch of the surface modes from the two slabs with a relative rotation.

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Anomalous Near-Field Heat Transfer in Carbon-Based Nanostructures with Edge States

Cited by 28 publications

References 54 publications

Generalized first-principles method to study near-field heat transfer mediated by Coulomb interaction

Generalized first-principles method to study near-field heat transfer mediated by Coulomb interaction

Mechanical relations between conductive and radiative heat transfer

Twist-induced control of near-field heat radiation between magnetic Weyl semimetals

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