Optical study of electron and acoustic phonon confinement in ultrathin-body germanium-on-insulator nanolayers.
Sign Up to like & getrecommendations! Published in 2021 at "Nanoscale"
DOI: 10.1039/d1nr01355f
Abstract: Nanoelectronics require semiconductor nanomaterials with high electron mobility like Ge nanolayers. Phonon and electron states in nanolayers undergo size-dependent changes induced by confinement and surface effects. Confined electrons and acoustic phonons determine layer optical, electric… read more here.
Keywords: geoi; germanium insulator; confinement; phonon ... See more keywords
Transverse acoustic phonon anomalies at intermediate wave vectors in MgV 2 O 4
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review B"
DOI: 10.1103/physrevb.96.184301
Abstract: Magnetic spinels (with chemical formula $A{X}_{2}{\mathrm{O}}_{4}$, with $X$ a $3d$ transition metal ion) that also have an orbital degeneracy are Jahn-Teller active and hence possess a coupling between spin and lattice degrees of freedom. At… read more here.
Keywords: wave vectors; transverse acoustic; phonon; acoustic phonon ... See more keywords
Evidence for terahertz acoustic phonon parametric oscillator based on acousto-optic degenerate four-wave mixing in a silicon doping superlattice
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review B"
DOI: 10.1103/physrevb.98.220304
Abstract: We report first evidence for a 1.0 terahertz (THz) self-starting mirrorless acoustic phonon parametric oscillator (MAPPO) produced from acousto-optic phase-conjugate degenerate four-wave (D4WM) mixing in a THz laser-pumped silicon doping superlattice (DSL). The DSL was… read more here.
Keywords: acousto optic; evidence terahertz; phonon; phonon parametric ... See more keywords
Anharmonic Eigenvectors and Acoustic Phonon Disappearance in Quantum Paraelectric SrTiO_{3}.
Sign Up to like & getrecommendations! Published in 2020 at "Physical review letters"
DOI: 10.1103/physrevlett.124.145901
Abstract: Pronounced anomalies in the SrTiO_{3} dynamical structure factor, S(Q,E), including the disappearance of acoustic phonon branches at low temperatures, were uncovered with inelastic neutron scattering (INS) and simulations. The striking effect reflects anharmonic couplings between… read more here.
Keywords: eigenvectors acoustic; space; disappearance; anharmonic eigenvectors ... See more keywords
Launching Coherent Acoustic Phonon Wave Packets with Local Femtosecond Coulomb Forces.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.129.043001
Abstract: Generation and manipulation of coherent acoustic phonons enables ultrafast control of solids and has been exploited for applications in various acoustic devices. We show that localized coherent acoustic phonon wave packets can be launched by… read more here.
Keywords: coulomb; wave packets; phonon wave; coherent acoustic ... See more keywords