Launching Phonon Polaritons by Natural Boron Nitride Wrinkles with Modifiable Dispersion by Dielectric Environments.
Sign Up to like & getrecommendations! Published in 2017 at "Advanced materials"
DOI: 10.1002/adma.201702494
Abstract: Interference-free hyperbolic phonon polaritons (HPPs) excited by natural wrinkles in a hexagonal boron nitride (hBN) microcrystal are reported both experimentally and theoretically. Although their geometries are off-resonant with the excitation wavelength, the wrinkles compensate for… read more here.
Keywords: phonon polaritons; dielectric environments; boron nitride; phonon ... See more keywords
Semiconductor Thermal and Electrical Properties Decoupled by Localized Phonon Resonances.
Sign Up to like & getrecommendations! Published in 2023 at "Advanced materials"
DOI: 10.1002/adma.202209779
Abstract: Thermoelectric materials convert heat into electricity through thermally driven charge transport in solids, or vice versa for cooling. To be competitive with conventional energy-generation technologies, a thermoelectric material must possess the properties of both an… read more here.
Keywords: phonon resonances; electrical properties; semiconductor; phonon ... See more keywords
Anomalously Suppressed Thermal Conduction by Electron‐Phonon Coupling in Charge‐Density‐Wave Tantalum Disulfide
Sign Up to like & getrecommendations! Published in 2020 at "Advanced Science"
DOI: 10.1002/advs.201902071
Abstract: Abstract Charge and thermal transport in a crystal is carried by free electrons and phonons (quantized lattice vibration), the two most fundamental quasiparticles. Above the Debye temperature of the crystal, phonon‐mediated thermal conductivity (κ L)… read more here.
Keywords: density wave; charge density; charge; phonon ... See more keywords
Atomistic Engineering of Phonons in Functional Oxide Heterostructures
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DOI: 10.1002/advs.202103403
Abstract: Engineering of phonons, that is, collective lattice vibrations in crystals, is essential for manipulating physical properties of materials such as thermal transport, electron‐phonon interaction, confinement of lattice vibration, and optical polarization. Most approaches to phonon‐engineering… read more here.
Keywords: atomic scale; phonon; engineering phonons; atomistic engineering ... See more keywords
Enhanced Electron Correlation and Significantly Suppressed Thermal Conductivity in Dirac Nodal‐Line Metal Nanowires by Chemical Doping
Sign Up to like & getrecommendations! Published in 2022 at "Advanced Science"
DOI: 10.1002/advs.202204424
Abstract: Enhancing electron correlation in a weakly interacting topological system has great potential to promote correlated topological states of matter with extraordinary quantum properties. Here, the enhancement of electron correlation in a prototypical topological metal, namely… read more here.
Keywords: phonon; correlation; thermal conductivity; metal ... See more keywords
Thickness-Dependent Thermal Conductivity and Phonon Mean Free Path Distribution in Single-Crystalline Barium Titanate.
Sign Up to like & getrecommendations! Published in 2023 at "Advanced science"
DOI: 10.1002/advs.202301273
Abstract: Nanosized perovskite ferroelectrics are widely employed in several electromechanical, photonics, and thermoelectric applications. Scaling of ferroelectric materials entails a severe reduction in the lattice (phonon) thermal conductivity, particularly at sub-100 nm length scales. Such thermal conductivity… read more here.
Keywords: phonon mean; mean free; phonon; distribution ... See more keywords
On-Chip Rolling Design for Controllable Strain Engineering and Enhanced Photon-Phonon Interaction in Graphene.
Sign Up to like & getrecommendations! Published in 2019 at "Small"
DOI: 10.1002/smll.201805477
Abstract: On-chip strain engineering is highly demanded in 2D materials as an effective route for tuning their extraordinary properties and integrating consistent functionalities toward various applications. Herein, rolling technique is proposed for strain engineering in monolayer… read more here.
Keywords: graphene; phonon; strain; strain engineering ... See more keywords
Theoretical Prediction of Thermoelectric Performance for Layered LaAgOX (X = S, Se) Materials in Consideration of the Four‐Phonon and Multiple Carrier Scattering Processes (Small Methods 3/2023)
Sign Up to like & getrecommendations! Published in 2023 at "Small Methods"
DOI: 10.1002/smtd.202201368
Abstract: Inspired by the experimental achievement of layered LaCuOX (X = S, Se) with superior thermoelectric (TE) performance, the TE properties of Ag-based isomorphic LaAgOX are systemically investigated by the first-principles calculation. The LaAgOS and LaAgOSe… read more here.
Keywords: performance; four phonon; phonon; type ... See more keywords
Antiadiabatic Phonons and Superconductivity in Eliashberg–McMillan Theory
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DOI: 10.1007/s10948-019-05277-4
Abstract: The standard Eliashberg–McMillan theory of superconductivity is essentially based on the adiabatic approximation. Here we present some simple estimates of electron–phonon interaction within the Eliashberg–McMillan approach in a non–adiabatic and even antiadiabatic situation, when characteristic… read more here.
Keywords: eliashberg mcmillan; phonon; mcmillan theory; mcmillan ... See more keywords
Electron–Phonon Scattering in AlAs and Its Response to Hydrostatic Pressure
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DOI: 10.1007/s11664-018-6651-5
Abstract: We perform first principles calculations to predict the electron–phonon (e–ph) scattering rates in AlAs and their dependence on phonon modes at energies close to the conduction band minima (CBM), as well as high into the… read more here.
Keywords: pressure; electron phonon; phonon; phonon scattering ... See more keywords
Temperature Dependence of Raman and Photoluminescence Spectra of Ternary Alloyed CdSe0.3Te0.7 Quantum Dots
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Electronic Materials"
DOI: 10.1007/s11664-020-07961-x
Abstract: The Raman and photoluminescence spectra of ternary alloyed CdSe0.3Te0.7 quantum dots (QDs) have been studied at temperatures between 84 K and 293 K. The average diameter of QDs is about 5.1 nm. The temperature dependence… read more here.
Keywords: phonon; photoluminescence spectra; temperature dependence; temperature ... See more keywords