Observation of specific optical phonon modes dominating Li ion diffusion in γ-LiAlO2 ceramic
Sign Up to like & getrecommendations! Published in 2021 at "Ceramics International"
DOI: 10.1016/j.ceramint.2021.03.112
Abstract: Abstract In γ-LiAlO2 ceramic, Li ion diffusion plays a key role both in tritium release as a solid tritium breeder material in nuclear fusion and in phase stability as a matrix material in molten carbonate… read more here.
Keywords: lialo2 ceramic; phonon modes; ion; phonon ... See more keywords
Estimation of anharmonic parameters of nano-crystalline Sc2O3 and Nd2O3
Sign Up to like & getrecommendations! Published in 2021 at "Materials Today Communications"
DOI: 10.1016/j.mtcomm.2021.102759
Abstract: Abstract We report anharmonic characteristics of cubic Scandium Oxide (Sc2O3) and hexagonal Neodymium Oxide (Nd2O3) through temperature dependent phonon mode variation in the temperature range 80–440 K. The samples were characterized as nanocrystalline and stoichiometric with… read more here.
Keywords: temperature; phonon; phonon modes; anharmonic parameters ... See more keywords
Phonon-Mode Calculation, Far- and Mid-Infrared, and Raman Spectra of an ε-Ga0.5Fe1.5O3 Magnet
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Physical Chemistry C"
DOI: 10.1021/acs.jpcc.6b12694
Abstract: Gallium-substituted epsilon iron oxide (e-Ga0.5Fe1.5O3) has drawn attention because its millimeter wave absorption frequency meets the millimeter wave radar frequency for automobiles. We report the phonon modes of e-Ga0.5Fe1.5O3, which has an orthorhombic structure in… read more here.
Keywords: phonon mode; far mid; 5fe1 5o3; phonon ... See more keywords
Isotopic study of Raman active phonon modes in β-Ga2O3
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Materials Chemistry C"
DOI: 10.1039/d0tc04101g
Abstract: The Raman-active phonon modes of β-Ga2O3 in two O isotope compositions are studied by theory and experiment. Raman modes dominated by different, inequivalent O lattice sites were identified and can be used for the investigation… read more here.
Keywords: modes ga2o3; phonon modes; active phonon; raman active ... See more keywords
Cooperative coupling of anisotropic phonon modes intensifies visible thermochromism in layered α-MoO3.
Sign Up to like & getrecommendations! Published in 2022 at "Materials horizons"
DOI: 10.1039/d2mh00090c
Abstract: Applications that provide versatile, high temperature warnings require the development of thermochromic materials based on solid-state oxides. To boost the visible thermochromic properties, a fundamental approach to reveal the unclear roles of local structure on… read more here.
Keywords: visible thermochromism; thermochromism layered; phonon modes; temperature ... See more keywords
Infrared-active optical phonons in LiFePO4 single crystals
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Applied Physics"
DOI: 10.1063/1.4995282
Abstract: Infrared-active optical phonons were studied in olivine LiFePO4 oriented single crystals by means of both rotating analyzer and rotating compensator spectroscopic ellipsometry in the spectral range between 50 and 1400 cm−1. The eigenfrequencies, oscillator strengths, and… read more here.
Keywords: phonons lifepo4; single crystals; active optical; phonon modes ... See more keywords
Calculated phonon modes, infrared and Raman spectra in orthorhombic α − MoO3 and monolayer MoO3
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Applied Physics"
DOI: 10.1063/5.0060718
Abstract: Orthorhombic α-MoO3 is a layered oxide with various applications and with excellent potential to be exfoliated as a 2D ultra-thin film or monolayer. In this paper, we present a first-principles computational study of its vibrational… read more here.
Keywords: moo3; monolayer; orthorhombic moo3; infrared raman ... See more keywords
Anharmonicity in Raman-active phonon modes in atomically thin MoS2
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.101.205302
Abstract: Phonon-phonon anharmonic effects have a strong influence on the phonon spectrum; most prominent manifestation of these effects are the softening (shift in frequency) and broadening (change in FWHM) of the phonon modes at finite temperature.… read more here.
Keywords: temperature dependence; mathrm; phonon modes; temperature ... See more keywords
Scattering of carriers by coupled plasmon-phonon modes in bulk polar semiconductors and polar semiconductor heterostructures
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review B"
DOI: 10.1103/physrevb.95.045210
Abstract: Scattering of carriers by coupled plasmon-phonon modes in bulk polar semiconductors and polar semiconductor heterostructures Author(s) Fahy. Stephen B.; Hauber, Anna Publication date 2017-01-25 Original citation Hauber, A. and Fahy, S. (2017) 'Scattering of carriers… read more here.
Keywords: scattering carriers; coupled plasmon; plasmon phonon; modes bulk ... See more keywords
Soft phonon mode dynamics in Aurivillius-type structures
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DOI: 10.1103/physrevb.96.134114
Abstract: We report the dynamics of soft phonon modes and their role towards the various structural transformations in Aurivillius materials by employing terahertz frequency-domain spectroscopy, atomic pair distribution function analysis, and first-principles calculations. We have chosen… read more here.
Keywords: phonon mode; soft phonon; dynamics aurivillius; phonon ... See more keywords
Generalization of soft phonon modes
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review B"
DOI: 10.1103/physrevb.97.134114
Abstract: Soft phonon modes describe a collective movement of atoms that transform a higher-symmetry crystal structure into a lower-symmetry crystal structure. Such structural transformations occur at finite temperatures, where the phonons (i.e., the low-temperature vibrational modes)… read more here.
Keywords: soft phonon; generalization soft; phonon; phonon modes ... See more keywords