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- W2418366073 abstract "Abstract The successful exfoliation of atomically-thin bismuth telluride (Bi 2 Te 3 ) quintuple layer (QL) attracts tremendous research interest in this strongly anharmonic quasi-two-dimensional material. The thermal transport properties of this material are not well understood, especially the mode-wise properties and when it is coupled with a substrate. In this work, we have performed molecular dynamics simulations and normal mode analysis to study the mode-resolved thermal transport in freestanding and supported Bi 2 Te 3 QL. The detailed mode-wise phonon properties are calculated and the accumulated thermal conductivities with respect to phonon mean free path (MFP) are constructed. It is shown that 60% of the thermal transport is contributed by phonons with MFP longer than 20 nm. Coupling with a -SiO 2 substrate leads to about 60% reduction of thermal conductivity. Through varying the interfacial coupling strength and the atomic mass of substrate, we also find that phonon in Bi 2 Te 3 QL is more strongly scattered by interfacial potential and its transport process is less affected by the dynamics of substrate. Our study provides an in-depth understanding of heat transport in Bi 2 Te 3 QL and is helpful in further tailoring its thermal property through nanostructuring." @default.
- W2418366073 created "2016-06-24" @default.
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- W2418366073 date "2016-06-06" @default.
- W2418366073 modified "2023-10-04" @default.
- W2418366073 title "Thermal transport in bismuth telluride quintuple layer: mode-resolved phonon properties and substrate effects" @default.
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- W2418366073 doi "https://doi.org/10.1038/srep27492" @default.
- W2418366073 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4893745" @default.
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