• A phonon is a collective excitation in a periodic, elastic arrangement of atoms or molecules in condensed matter, specifically in solids and some liquids...
    47 KB (6,913 words) - 21:30, 12 October 2024
  • Thumbnail for Phonon polariton
    physics, a phonon polariton is a type of quasiparticle that can form in a diatomic ionic crystal due to coupling of transverse optical phonons and photons...
    18 KB (2,527 words) - 18:25, 12 October 2024
  • Phonons can scatter through several mechanisms as they travel through the material. These scattering mechanisms are: Umklapp phonon-phonon scattering,...
    8 KB (1,131 words) - 01:57, 11 July 2022
  • Phonon noise, also known as thermal fluctuation noise, arises from the random exchange of energy between a thermal mass and its surrounding environment...
    4 KB (543 words) - 22:37, 6 August 2022
  • spectrum of other phonons, which is known as the phonon decay. The two most important anharmonic effects are the thermal expansion and the phonon thermal conductivity...
    63 KB (8,360 words) - 20:48, 18 October 2024
  • Thumbnail for Zero-phonon line and phonon sideband
    The zero-phonon line and the phonon sideband jointly constitute the line shape of individual light absorbing and emitting molecules (chromophores) embedded...
    9 KB (1,163 words) - 15:29, 28 March 2022
  • Thumbnail for Sound amplification by stimulated emission of radiation
    amplification based on stimulated emission of phonons. Sound (or lattice vibration) can be described by a phonon just as light can be considered as photons...
    55 KB (7,513 words) - 23:36, 26 October 2024
  • Thumbnail for Surface phonon
    In solid state physics, a surface phonon is the quantum of a lattice vibration mode associated with a solid surface. Similar to the ordinary lattice vibrations...
    12 KB (1,824 words) - 22:41, 7 December 2023
  • Phonon drag is an increase in the effective mass of conduction electrons or valence holes due to interactions with the crystal lattice in which the electron...
    2 KB (269 words) - 10:31, 29 December 2022
  • storage, transport, and energy transformation by principal energy carriers: phonons (lattice vibration waves), electrons, fluid particles, and photons. Heat...
    67 KB (9,679 words) - 21:11, 23 July 2024
  • Thumbnail for Phonon (software)
    Phonon is the multimedia API provided by KDE and is the standard abstraction for handling multimedia streams within KDE software and also used by several...
    7 KB (686 words) - 15:28, 4 February 2024
  • Phonon 2555 Vision is a live video album by Susumu Hirasawa. It contains recordings of the Phonon 2555 shows from 2012, part of the "Phonon" series of...
    8 KB (642 words) - 22:24, 15 December 2023
  • Thumbnail for Phonon Communications
    Phonon is a cloud telephony company in Asia. It was founded in October 2006 by Samish Makhija and Ujwal Makhija, who are alumni of IIM Ahmedabad and IIM...
    6 KB (345 words) - 23:31, 21 October 2024
  • Thumbnail for Umklapp scattering
    scattering or an anharmonic phonon-phonon (or electron-phonon) scattering process, reflecting an electronic state or creating a phonon with a momentum k-vector...
    5 KB (557 words) - 10:08, 31 July 2023
  • of heat in solids involves both electrons and vibrations of the atoms (phonons). When the solid is perfectly ordered over hundreds of thousands of atoms...
    30 KB (4,266 words) - 17:57, 7 September 2024
  • emitting a phonon is: m ∗ v emit 2 2 ≈ ℏ ω phonon (opt.) {\displaystyle {\frac {m^{*}v_{\text{emit}}^{2}}{2}}\approx \hbar \omega _{\text{phonon (opt.)}}}...
    51 KB (7,202 words) - 18:45, 21 September 2024
  • Thumbnail for Franck–Condon principle
    more lattice phonons. In the low-temperature approximation, emission is from the zero-phonon level of the excited state to the zero-phonon level of the...
    28 KB (3,556 words) - 07:11, 8 September 2024
  • Thumbnail for Direct and indirect band gaps
    bandgap as well, for example AlSb. Interactions among electrons, holes, phonons, photons, and other particles are required to satisfy conservation of energy...
    11 KB (1,578 words) - 21:57, 2 October 2024
  • electron holes. Other quasiparticles or collective excitations include the phonon, a quasiparticle derived from the vibrations of atoms in a solid, and the...
    26 KB (3,229 words) - 07:29, 23 October 2024
  • Thumbnail for Lyddane–Sachs–Teller relation
    ratio of the natural frequency of longitudinal optic lattice vibrations (phonons) ( ω LO {\displaystyle \omega _{\text{LO}}} ) of an ionic crystal to the...
    12 KB (1,446 words) - 23:59, 6 June 2024
  • light when it encounters acoustic phonons in a crystal, a process known as Brillouin scattering, to determine phonon energies and therefore interatomic...
    15 KB (2,026 words) - 19:24, 12 March 2024
  • Thumbnail for Polariton
    dipole-carrying excitation (state) of solid or liquid matter (such as a phonon, plasmon, or an exciton).[example needed] Polaritons describe the crossing...
    12 KB (1,269 words) - 20:26, 13 October 2024
  • with complex phonon dispersions is using the Einstein model which states that only one phonon mode exists in solids. For optical phonons, this approximation...
    18 KB (3,188 words) - 17:04, 1 August 2023
  • phonon distribution multiplied by the energy of one phonon, times the group velocity of the phonons. The phonon distribution of a particular phonon mode...
    2 KB (327 words) - 18:01, 26 April 2024
  • electromagnetic and lattice vibrational waves known as phonon-polaritons, rather than currents or photons. Since phonon-polaritons propagate with frequencies in the...
    14 KB (1,408 words) - 00:09, 8 November 2023
  • Thumbnail for Phonovoltaic
    A phonovoltaic (pV) cell converts vibrational (phonons) energy into a direct current much like the photovoltaic effect in a photovoltaic (PV) cell converts...
    22 KB (3,323 words) - 23:16, 10 July 2022
  • electron-longitudinal acoustic phonon interaction is an interaction that can take place between an electron and a longitudinal acoustic (LA) phonon in a material such...
    6 KB (1,156 words) - 21:39, 29 May 2023
  • In conventional superconductors, this attraction is due to the electron–phonon interaction. The Cooper pair state is responsible for superconductivity...
    10 KB (1,142 words) - 03:09, 6 February 2024
  • Thumbnail for Seebeck coefficient
    are fewer phonons available for drag, and at higher temperatures they tend to lose momentum in phonon-phonon scattering instead of phonon-electron scattering...
    30 KB (4,335 words) - 15:12, 9 October 2024
  • Thumbnail for Polaron
    equilibrium positions to effectively screen the charge of an electron, known as a phonon cloud. This lowers the electron mobility and increases the electron's effective...
    48 KB (5,761 words) - 19:59, 3 October 2024