Journal ArticleDOI
Significant decrease of the lattice thermal conductivity due to phonon confinement in a free-standing semiconductor quantum well
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TLDR
In this article, the lattice thermal conductivity of a quantum well limited by umklapp, impurity, and boundary scattering was investigated theoretically by taking into account dispersion of confined acoustic-phonon modes.Abstract:
Lattice thermal conductivity of a quantum well limited by umklapp, impurity, and boundary scattering was investigated theoretically by taking into account dispersion of confined acoustic-phonon modes. We show that strong modification of phonon group velocities due to spatial confinement leads to a significant increase in the phonon relaxation rates. From the numerical calculations, we predict a decrease by an order of magnitude of the lattice thermal conductivity in a 100-\AA{}-wide free-standing quantum well. Our theoretical results are consistent with recent experimental investigations of the lateral thermal conductivity of nitride/silicon/oxide membranes conducted in our group.read more
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Journal ArticleDOI
Superior Thermal Conductivity of Single-Layer Graphene
Alexander A. Balandin,Suchismita Ghosh,Wenzhong Bao,Irene Calizo,Desalegne Teweldebrhan,Feng Miao,Chun Ning Lau +6 more
TL;DR: The extremely high value of the thermal conductivity suggests that graphene can outperform carbon nanotubes in heat conduction and establishes graphene as an excellent material for thermal management.
Journal ArticleDOI
Thermal properties of graphene and nanostructured carbon materials
TL;DR: The thermal properties of carbon materials are reviewed, focusing on recent results for graphene, carbon nanotubes and nanostructured carbon materials with different degrees of disorder, with special attention given to the unusual size dependence of heat conduction in two-dimensional crystals.
Journal ArticleDOI
Thermal Properties of Graphene, Carbon Nanotubes and Nanostructured Carbon Materials
TL;DR: In this paper, the authors review thermal and thermoelectric properties of carbon materials focusing on recent results for graphene, carbon nanotubes and nanostructured carbon materials with different degrees of disorder.
Journal ArticleDOI
Thermal conductivity of individual silicon nanowires
TL;DR: The thermal conductivities of individual single crystalline intrinsic Si nanowires with diameters of 22, 37, 56, and 115 nm were measured using a microfabricated suspended device over a temperature range of 20-320 K as discussed by the authors.
References
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ReportDOI
Thermal Conductivity of Soils
TL;DR: In this paper, a mathematical model for calculating thermal conductivity of soils with ordinary soil parameters as input data is presented. But the model is not suitable for the measurement of heat transfer mechanisms in moist materials, and it is difficult to obtain bounds for the different domains where the various mechanisms have an appreciable influence on the total heat transfer.
Proceedings ArticleDOI
Three phonon scattering in superlattices
TL;DR: In this article, the theoretical investigation of semiconductor superlattice thermal conductivity caused by three-phonon interactions has been carried out and it is shown that thermal conductivities dependence on temperature is determined by the mini-Umklapp-processes.