General theories and features of interfacial thermal transport

Zhou, Hangbo; Zhang, Gang

doi:10.1088/1674-1056/27/3/034401

Cited by 33 publications

(15 citation statements)

References 95 publications

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“…[ [38][39][40] The observed layer independence of the ITC implies no layer dependence in the phonon spectra matching and interaction between substrates and the MoS2 .…”

Section: Resultsmentioning

confidence: 99%

In-Plane and Interfacial Thermal Conduction of Two-Dimensional Transition-Metal Dichalcogenides

Minhaj

Huang

et al. 2020

Phys. Rev. Applied

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We elucidate the dependence of the in-plane and interfacial thermal conduction of twodimensional (2D) transition metal dichalcogenide (TMDC) materials (including MoS2, WS2, and WSe2) on the materials' physical features, such as size, layer number, composition, and substrates.The in-plane thermal conductivity k is measured at suspended 2D TMDC materials and the interfacial thermal conductance g measured at the materials supported onto substrates, both with Raman thermometry techniques. The thermal conductivity k increases with the radius R of the suspended area following a logarithmic scaling as k ~ log(R). k also shows a substantial decrease from monolayer to bilayer, but only changes mildly with further increase in the layer number. In contrast, the interfacial thermal conductance g bears negligible dependence on the layer number.But g increases with the strength of the interaction between 2D TMDC materials and the substrate, substantially varying among different substrates. The result is consistent with theoretical predictions and clarifies much inconsistence in references. This work provides useful guidance for the thermal management in 2D TMDC materials and devices.

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“…[ [38][39][40] The observed layer independence of the ITC implies no layer dependence in the phonon spectra matching and interaction between substrates and the MoS2 .…”

Section: Resultsmentioning

confidence: 99%

In-Plane and Interfacial Thermal Conduction of Two-Dimensional Transition-Metal Dichalcogenides

Minhaj

Huang

et al. 2020

Phys. Rev. Applied

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“…The nonequilibrium Green’s function (NEGF) method is used to study the elastic phonon transport properties of graphene nanoribbons herein, which is appropriate to study the thermal transport properties of nanoscale junctions [56]. It is a successful method to describe quantum thermal transport in nanosystems, such as nanowires [57,58], nanotubes [59,60], nanoribbons [61,62], the nanostructures with isotope, defects [63,64,65,66] or strain [67].…”

Section: Methodsmentioning

confidence: 99%

Effects of Divacancy and Extended Line Defects on the Thermal Transport Properties of Graphene Nanoribbons

Luo

2019

Nanomaterials

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The effects of divacancy, including isolated defects and extended line defects (ELD), on the thermal transport properties of graphene nanoribbons (GNRs) are investigated using the Nonequilibrium Green’s function method. Different divacancy defects can effectively tune the thermal transport of GNRs and the thermal conductance is significantly reduced. The phonon scattering of a single divacancy is mostly at high frequencies while the phonon scattering at low frequencies is also strong for randomly distributed multiple divacancies. The collective effect of impurity scattering and boundary scattering is discussed, which makes the defect scattering vary with the boundary condition. The effect on thermal transport properties of a divacancy is also shown to be closely related to the cross section of the defect, the internal structure and the bonding strength inside the defect. Both low frequency and high frequency phonons are scattered by 48, d5d7 and t5t7 ELD. However, the 585 ELD has almost no influence on phonon scattering at low frequency region, resulting in the thermal conductance of GNRs with 585 ELD being 50% higher than that of randomly distributed 585 defects. All these results are valuable for the design and manufacture of graphene nanodevices.

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“…The commonly adopted macroscopic theoretical models include the acoustic mismatch model (AMM) and diffuse mismatch model (DMM). [125] In the AMM, the ITR is estimated from the acoustic properties of the bulk, ignoring the phonon scattering at interfaces, thus resulting in underestimation of the thermal resistance. In contrast, in DMM, all the phonons are assumed to be completely scattered at the interfaces.…”

Section: Thermal Transport Across An Amorphous Interfacementioning

confidence: 99%

Thermal Conductivity of Amorphous Materials

Zhou

Cheng

Chen

et al. 2019

Adv Funct Materials

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197

110

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Thermal conductivity is one of the most fundamental properties of solid materials. The thermal conductivity of ideal crystal materials has been widely studied over the past hundreds years. On the contrary, for amorphous materials that have valuable applications in flexible electronics, wearable electrics, artificial intelligence chips, thermal protection, advanced detectors, thermoelectrics, and other fields, their thermal properties are relatively rarely reported. Moreover, recent research indicates that the thermal conductivity of amorphous materials is quite different from that of ideal crystal materials. In this article, the authors systematically review the fundamental physical aspects of thermal conductivity in amorphous materials. They discuss the method to distinguish the different heat carriers (propagons, diffusons, and locons) and the relative contribution from them to thermal conductivity. In addition, various influencing factors, such as size, temperature, and interfaces, are addressed, and a series of interesting anomalies are presented. Finally, the authors discuss a number of open problems on thermal conductivity of amorphous materials and a brief summary is provided.

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General theories and features of interfacial thermal transport

Cited by 33 publications

References 95 publications

In-Plane and Interfacial Thermal Conduction of Two-Dimensional Transition-Metal Dichalcogenides

In-Plane and Interfacial Thermal Conduction of Two-Dimensional Transition-Metal Dichalcogenides

Effects of Divacancy and Extended Line Defects on the Thermal Transport Properties of Graphene Nanoribbons

Thermal Conductivity of Amorphous Materials

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