Panoramic Mapping of Phonon Transport from Ultrafast Electron Diffraction and Scientific Machine Learning
Sign Up to like & getrecommendations! Published in 2022 at "Advanced Materials"
DOI: 10.1002/adma.202206997
Abstract: One central challenge in understanding phonon thermal transport is a lack of experimental tools to investigate frequency‐resolved phonon transport. Although recent advances in computation lead to frequency‐resolved information, it is hindered by unknown defects in… read more here.
Keywords: ultrafast electron; transport; electron diffraction; phonon transport ... See more keywords
Phonon Transport Across Coherent and Incoherent Interfaces
Sign Up to like & getrecommendations! Published in 2019 at "JOM"
DOI: 10.1007/s11837-019-03731-1
Abstract: Phonon-mediated heat transport in two-dimensional superlattices with coherent and incoherent interfaces is simulated by using the concurrent atomistic-continuum method. The energy transmission across superlattices with incoherent interfaces is found to be an order of magnitude… read more here.
Keywords: phonon transport; transport across; phonon; incoherent interfaces ... See more keywords
First-principles analysis of structural stability, electronic and phonon transport properties of lateral MoS2-WX2 heterostructures
Sign Up to like & getrecommendations! Published in 2019 at "Computational Condensed Matter"
DOI: 10.1016/j.cocom.2019.e00389
Abstract: Abstract We performed first-principles-based methods to study the structural stability, electronic and phonon transport properties of lateral transition metal dichalcogenides. Specifically, we focused on the interface at the MoS2-WX2 heterostructures, where X = S or Se. The… read more here.
Keywords: phonon transport; first principles; electronic phonon; structural stability ... See more keywords
Direct first-principle-based study of mode-wise in-plane phonon transport in ultrathin silicon films
Sign Up to like & getrecommendations! Published in 2019 at "International Journal of Heat and Mass Transfer"
DOI: 10.1016/j.ijheatmasstransfer.2019.118507
Abstract: Fundamental understanding of thermal transport properties in ultrathin Si-based films is essential for the thermal management of nanoelectronic and nanophotonic devices. Using Density-Functional-based tight-binding method and direct iterative solution of linearized Boltzmann transport equation without… read more here.
Keywords: plane; transport; phonon transport; transport ultrathin ... See more keywords
A hierarchy of macroscopic models for phonon transport in graphene
Sign Up to like & getrecommendations! Published in 2020 at "Physica A: Statistical Mechanics and its Applications"
DOI: 10.1016/j.physa.2020.124489
Abstract: Abstract In this work, we propose a hierarchy of macroscopic models for the description of phonon transport in graphene. They are devised starting from the phonon Boltzmann transport equation by using the moments method and… read more here.
Keywords: transport graphene; hierarchy macroscopic; graphene; macroscopic models ... See more keywords
Synergistically Optimized Carrier and Phonon Transport Properties in Bi-Cu2S Coalloyed GeTe.
Sign Up to like & getrecommendations! Published in 2022 at "ACS applied materials & interfaces"
DOI: 10.1021/acsami.2c14636
Abstract: GeTe is an emerging lead-free thermoelectric material, but its excessive carrier concentration and high thermal conductivity severely restrict the enhancement of thermoelectric properties. In this study, the synergistically optimized thermoelectric properties of p-type GeTe through… read more here.
Keywords: carrier phonon; carrier; phonon transport; transport properties ... See more keywords
Band Structure and Phonon Transport Engineering Realizing Remarkable Improvement in Thermoelectric Performance of Cu2SnSe4 Incorporated with In2Te3.
Sign Up to like & getrecommendations! Published in 2022 at "ACS applied materials & interfaces"
DOI: 10.1021/acsami.2c14688
Abstract: Cu2SnSe4 (CTS) ternary chalcogenides have potential applications in thermoelectrics for they crystallize in a high-symmetry cubic structure and consist of earth-abundant and eco-friendly elements. However, the pristine CTS does not have optimal thermoelectric (TE) performance… read more here.
Keywords: structure; performance; cu2snse4; phonon transport ... See more keywords
Strategies for Manipulating Phonon Transport in Solids.
Sign Up to like & getrecommendations! Published in 2021 at "ACS nano"
DOI: 10.1021/acsnano.0c10411
Abstract: In this review, we summarize the recent efforts on manipulating phonon transport in solids by using specific techniques that modify their phonon thermal conductivity (i.e., specific heat, phonon group velocity, and mean free path) and… read more here.
Keywords: phonon thermal; transport solids; transport; phonon ... See more keywords
Observation of superdiffusive phonon transport in aligned atomic chains
Sign Up to like & getrecommendations! Published in 2021 at "Nature Nanotechnology"
DOI: 10.1038/s41565-021-00884-6
Abstract: Fascinating phenomena can occur as charge and/or energy carriers are confined in one dimension1–4. One such example is the divergent thermal conductivity (κ) of one-dimensional lattices, even in the presence of anharmonic interatomic interactions—a direct… read more here.
Keywords: length; transport; atomic chains; phonon ... See more keywords
Heat vortex in hydrodynamic phonon transport of two-dimensional materials
Sign Up to like & getrecommendations! Published in 2020 at "Scientific Reports"
DOI: 10.1038/s41598-020-65221-8
Abstract: We study hydrodynamic phonon heat transport in two-dimensional (2D) materials. Starting from the Peierls-Boltzmann equation with the Callaway model approximation, we derive a 2D Guyer-Krumhansl-like equation describing hydrodynamic phonon transport, taking into account the quadratic… read more here.
Keywords: transport two; transport; hydrodynamic phonon; phonon ... See more keywords
Anisotropic phonon transport and lattice thermal conductivities in tin dichalcogenides SnS2 and SnSe2
Sign Up to like & getrecommendations! Published in 2017 at "RSC Advances"
DOI: 10.1039/c6ra27761f
Abstract: In recent years, layered semiconductor tin dichalcogenides, SnX2 (X = S and Se), have received great attention owing to their wide applications in numerous fields. However, theoretical studies on their phonon transport properties and lattice… read more here.
Keywords: lattice thermal; transport; thermal conductivities; tin dichalcogenides ... See more keywords