Results 31 to 40 of about 129,819 (311)
Phonon-assisted optical absorption of SiC polytypes from first principles
, 2023 Silicon carbide (SiC) is an indirect-gap semiconductor material widely used in electronic and optoelectronic applications. While experimental measurements of the phonon-assisted absorption coefficient of SiC across its indirect gap have existed for more ...
Xiao Zhang (152326) +1 more
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Phonon Anharmonicity and Spin–Phonon Coupling in CrI3
Materials, 2023 We report on the far-infrared, temperature-dependent optical properties of a CrI3 transition metal halide single crystal, a van der Waals ferromagnet (FM) with a Curie temperature of 61 K. In addition to the expected phonon modes determined by the crystalline symmetry, the optical reflectance and transmittance spectra of CrI3 single crystals show many ...
Luca Tomarchio +8 more
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Phonon–Phonon Interactions in the Polarization Dependence of Raman Scattering [PDF]
The Journal of Physical Chemistry C, 2023 We have found that the polarization dependence of Raman scattering in organic crystals at finite temperatures can only be described by a fourth-rank formalism. This generalization of the second-rank Raman tensor $\mathcal{R}$ stems from the effect of off-diagonal components in the crystal self-energy on the light scattering mechanism. We thus establish
Nimrod Benshalom +8 more
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Phonon-Dressed Third-Harmonic Generation in Diamond
, 2023 We demonstrate a strong, elastic, frequency-upshifting optical polarizability that accompanies sum-frequency driving of Raman phonons and two-photon absorption, extending the duality of structural and optical property modification recently observed in ...
Jiaoyang Zheng (14417055) +2 more
core +1 more source
Advanced Science, 2023 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 ...
Ankit Negi +9 more
doaj +1 more source
Thermoelasticity of Hexagonal Close-Packed Iron from the Phonon Density of States [PDF]
, 2012 Iron is the main constituent in Earth’s core, along with ~5 to 10 wt% Ni and some light elements (e.g., H, C, O, Si, S). This thesis explores the vibrational thermodynamic and thermoelastic properties of pure hexagonal close-packed iron (ε-Fe), in an ...
Murphy, Caitlin Anne
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Tunable phonon-driven magnon–magnon entanglement at room temperature
New Journal of Physics, 2023 We report the existence of entangled steady-states in bipartite quantum magnonic systems at elevated temperatures. We consider dissipative dynamics of two magnon modes in a bipartite antiferromagnet, subjected to interaction with a phonon mode and an ...
Yuefei Liu +9 more
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Thermalization in simple metals: Role of electron-phonon and phonon-phonon scattering [PDF]
Physical Review B, 2018 We study the electron and phonon thermalization in simple metals excited by a laser pulse. The thermalization is investigated numerically by solving the Boltzmann transport equation taking into account all the relevant scattering mechanism: the electron-electron, electron-phonon (e-ph), phonon-electron (ph-e), and phonon-phonon (ph-ph) scatterings.
openaire +2 more sources
The Phonon Entropy of Transition Metals and Alloys: Effects of Impurities and of a Martensitic Phase Transition [PDF]
, 2006 For a fixed configuration of ions on a given crystalline lattice, low energy excitations around the static average configuration can be thermally activated and will contribute to the entropy of the system.
Delaire, Olivier
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