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Quasiparticle of mechanical vibrations
A phonon is a quasiparticle, collective excitation in a periodic, elastic arrangement of atoms or molecules in condensed matter, specifically in solids
Phonon
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
Phonon_drag
Aspect of condensed matter physics
Phonons can scatter through several mechanisms as they travel through the material. These scattering mechanisms are: Umklapp phonon-phonon scattering,
Phonon_scattering
Concept in physics
The zero-phonon line and the phonon sideband jointly constitute the line shape of individual light absorbing and emitting molecules (chromophores) embedded
Zero-phonon line and phonon sideband
Zero-phonon_line_and_phonon_sideband
Capacity of a material to conduct heat
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
Thermal conductivity and resistivity
Thermal_conductivity_and_resistivity
Quasiparticle form phonon and photon coupling
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
Phonon_polariton
Device that emites acoustic 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
Sound amplification by stimulated emission of radiation
Sound_amplification_by_stimulated_emission_of_radiation
Random energy exchange from thermal masses
Phonon noise, also known as thermal fluctuation noise, arises from the random exchange of energy between a thermal mass and its surrounding environment
Phonon_noise
KDE multimedia framework
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
Phonon_(software)
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
Surface_phonon
2013 video by Susumu Hirasawa
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
Phonon_2555_Vision
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
Phonon_Communications
Quantity in solid-state physics
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.)}}}
Electron_mobility
Quasiparticles arising from EM wave coupling
dipole-carrying excitation (state) of solid or liquid matter (such as a phonon, plasmon, or an exciton). Polaritons describe the crossing of the dispersion
Polariton
Concept in condensed matter physics
electron holes. Other quasiparticles or collective excitations include the phonon, a quasiparticle derived from the vibrations of atoms in a solid, and the
Quasiparticle
light when it encounters acoustic phonons in a crystal, a process known as Brillouin scattering, to determine phonon energies and therefore interatomic
Brillouin_spectroscopy
The quasi-harmonic approximation is a phonon-based model of solid-state physics used to describe volume-dependent thermal effects, such as the thermal
Quasi-harmonic_approximation
Quantum chemistry rule regarding vibronic transitions
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
Franck–Condon_principle
Method in physics
estimate phonon contribution to the specific heat (heat capacity) in a solid. It treats the vibrations of the atomic lattice (heat) as phonons in a box
Debye_model
Model of phonons-polaritons
electromagnetic and lattice vibrational waves known as phonon-polaritons, rather than currents or photons. Since phonon-polaritons propagate with frequencies in the
Polaritonics
Quasiparticle in condensed matter physics
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
Polaron
Resistance to thermal flow between two materials
vibrational properties in different materials, when an energy carrier (phonon or electron, depending on the material) attempts to traverse the interface
Interfacial thermal resistance
Interfacial_thermal_resistance
Branch of physics
storage, transport, and energy transformation by principal energy carriers: phonons (lattice vibration waves), electrons, fluid particles, and photons. Heat
Heat_transfer_physics
Scattering process outside crystals' first Brillouin zone
scattering or an anharmonic phonon-phonon (or electron-phonon) scattering process, reflecting an electronic state or creating a phonon with a momentum k-vector
Umklapp_scattering
A phonovoltaic (pV) cell converts vibrational (phonons) energy into a direct current much like the photovoltaic effect in a photovoltaic (PV) cell converts
Phonovoltaic
Measure of voltage induced by change of temperature
are fewer phonons available for drag, and at higher temperatures they tend to lose momentum in phonon-phonon scattering instead of phonon-electron scattering
Seebeck_coefficient
American electrical engineer
explanation; studies of phonons in nanostructures and low-dimensional materials, which led to the development of the field of phonon engineering; investigation
Alexander_A._Balandin
ratio of the natural frequency of longitudinal optic lattice vibrations (phonons) ( ω LO {\displaystyle \omega _{\text{LO}}} ) of an ionic crystal to the
Lyddane–Sachs–Teller_relation
{k_{1}} })\right]\end{aligned}}} Phonon–phonon scattering, governed by anharmonic lattice interactions, thermalizes the phonon population on timescales of
Quantum_Boltzmann_equation
Types of energy range in a solid where no electron states can exist
bandgap as well, for example AlSb. Interactions among electrons, holes, phonons, photons, and other particles are required to satisfy conservation of energy
Direct_and_indirect_band_gaps
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
Thermal transport in nanostructures
Thermal_transport_in_nanostructures
phonon distribution multiplied by the energy of one phonon, times the group velocity of the phonons. The phonon distribution of a particular phonon mode
Heat_current
Materials whose temperature variance leads to voltage change
specific heat, and the phonon-spectrum. Interface roughness causes diffuse phonon scattering, which either increases or decreases the phonon reflectivity at
Thermoelectric_materials
Elementary quasiparticle
electron-phonon system: the probabilities of electron's occurrence at any point of a space are similar. Both the electron density and the amplitudes of phonon
TI-polaron
Quantum anomaly
anomaly or the Kohn effect is an anomaly in the dispersion relation of a phonon branch in a metal. The anomaly is named for Walter Kohn, who first proposed
Kohn_anomaly
Soviet physicist (1895–1971)
Cherenkov radiation. He also predicted the quasi-particle of sound: the phonon; and in 1951, together with Andrei Sakharov, proposed the Tokamak system
Igor_Tamm
Microscopic interaction in metals
Coulomb interaction with an attractive force mediated by lattice vibrations (phonons). The total interaction is modified by screening from the surrounding electron
Bardeen–Pines_interaction
Pair of electrons bound together at low temperature, allowing for superconductivity
this attraction is due to Bardeen–Pines interaction, a type of electron–phonon interaction. The Cooper pair state is responsible for superconductivity
Cooper_pair
Italian physicist and materials scientist
Giustino's work includes first-principles theory and software for electron–phonon interactions, including development of the EPW code distributed with Quantum
Feliciano_Giustino
with complex phonon dispersions is using the Einstein model which states that only one phonon mode exists in solids. For optical phonons, this approximation
Carrier_scattering
Statistical mechanics model for ultrafast carrier relaxation
energy to the phonon sub-system via electron-phonon scattering events. Electron-electron scattering (coulombic interaction) and phonon-phonon (anharmonic)
Two_temperature_model
Metallic palladium
This can be explained by a hardening of the phonon spectrum, which includes a decrease in the electron–phonon constant λ. The process of absorption of hydrogen
Palladium_hydride
Light emission from substances after they absorb photons
minimum. Typical mechanisms are Coulomb scattering and the interaction with phonons. Finally, the electrons recombine with holes under emission of photons
Photoluminescence
Quasiparticle of charge oscillations in condensed matter
since it arises from the quantization of plasma oscillations, just like phonons are quantizations of mechanical vibrations. Thus, plasmons are collective
Plasmon
Thermodynamical parameter of solids
Eduard Grüneisen, whose original definition was formulated in terms of the phonon nonlinearities. Because of the equivalences of many properties and derivatives
Grüneisen_parameter
Meng, N. Andrejevic, Y. Zhu, G. D. Mahan, and G. Chen, "Theory of electron-phonon-dislon interacting system – toward a quantized theory of dislocations",
List_of_quasiparticles
Synonym of phonon
substrate with a fractal structure. Fractons are the fractal analog of phonons. Phonons are the result of applying translational symmetry to the potential
Fracton
Material which exhibits superconductivity above 0 °C
strong coupling between the conduction electrons and the lattice-vibration phonons. A team at Harvard University has claimed to make metallic hydrogen and
Room-temperature superconductor
Room-temperature_superconductor
2008 software
components, notably a port to Qt 4. It contained a new multimedia API called Phonon, a device integration framework called Solid, and a new style guide and
KDE_Software_Compilation_4
Coherence then corresponds to a decrease in the occupation numbers of phonon modes and a decreased rate of inelastic scattering. Correspondingly, increased
Ballistic conduction in single-walled carbon nanotubes
Ballistic_conduction_in_single-walled_carbon_nanotubes
Behaviour of metals at low temperatures
metals due to the scattering of conduction electrons by lattice vibrations (phonons) below Debye temperature. The theory was initially put forward by Felix
Bloch–Grüneisen_law
Particle whose invariant mass is zero
but are not themselves real particles. Weyl fermions in matter are like phonons, which are also quasiparticles. No real particle that is a Weyl fermion
Massless_particle
Wave which propagates through a magnetic material
which are bosonic modes of the spin lattice that correspond roughly to the phonon excitations of the nuclear lattice. As temperature is increased, the thermal
Spin_wave
Energy quantum particles contribute to themselves
Another example of self-energy is found in the context of phonon softening due to electron-phonon coupling. Mathematically, this energy is equal to the so-called
Self-energy
Theoretical physicist
semiconductors. His studies of vibrational lifetimes revealed the concept of phonon trapping which provides a natural explanation for why and how defects reduce
Stefan_Karol_Estreicher
Energy range in a solid where no electron states exist
gain enough energy to jump to the conduction band by absorbing either a phonon (heat) or a photon (light). A semiconductor is a material with an intermediate-sized
Band_gap
Intensive quantity, heat capacity per amount of substance
thought that phonon theory is not able to explain the heat capacity of liquids, since liquids only sustain longitudinal, but not transverse phonons, which in
Molar_heat_capacity
Magneto-thermic effect in metals
the "phonon Hall effect". In this case, there are no charged currents in the solid, so the magnetic field cannot exert a Lorentz force. Phonon thermal
Thermal_Hall_effect
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
Electron-longitudinal acoustic phonon interaction
Electron-longitudinal_acoustic_phonon_interaction
Inelastic scattering of photons by matter
gases, information about rotational energy can also be gleaned. For solids, phonon modes may also be observed. The basics of infrared absorption regarding
Raman_scattering
Mineral supergroup
multiferroicity through cooperative exchange striction. Spin–phonon coupling also plays a central role. Phonon anomalies detected in Raman or infrared spectra at
Spinel_group
Resonant and recoil-free emission and absorption of gamma radiation by atomic nuclei
quasiparticles known as phonons. The Mössbauer effect occurs because there is a finite probability of a decay involving no phonons. Thus in a fraction of
Mössbauer_effect
Quantum mechanical phenomenon in which heat transfer occurs by wave-like motion
quasiparticle thermal excitations (rotons and phonons). Second sound can be observed in any system in which most phonon-phonon collisions conserve momentum, like
Second_sound
Quasiparticle which is a bound state of an electron and an electron hole
with phonons, the lattice vibrations. If this coupling is weak as in typical semiconductors such as GaAs or Si, excitons are scattered by phonons. However
Exciton
Heat capacity of an electron gas
capacity, is the specific heat of an electron gas. Heat is transported by phonons and by free electrons in solids. For pure metals, however, the electronic
Electronic_specific_heat
and f-field. Dislons interact with other particles such as electrons and phonons. In the presence of multiple dislocations, the electron-dislon interaction
Dislon
HTML element
provide a more consistent experience." Any format supported by Phonon backend. Available Phonon backends include DirectShow, QuickTime, GStreamer and xine;
HTML_video
Quantum state of a system
spontaneous or induced emission of a quantum of energy (such as a photon or a phonon) usually occurs shortly after the system is promoted to the excited state
Excited_state
releases"), a live performance with a new arrangement is included on the Phonon 2553 Vision DVD, a studio recording of that (named "2010 version") is included
Susumu_Hirasawa_discography
Process by which heat is transferred within an object
diffusion, as in metals, or phonon vibration, as in insulators. In insulators, the heat flux is carried almost entirely by phonon vibrations. Metals (e.g
Thermal_conduction
Model of a crystalline solid
especially for the high-temperature limit, these oscillations are in fact phonons, or collective modes involving many atoms. Albert Einstein was aware that
Einstein_solid
Device which diffracts light via sound waves
in sum-frequency generation or difference-frequency generation between phonons and photons. A typical AOM operates under Bragg condition, where the incident
Acousto-optic_modulator
Material designed to manipulate sound waves
crystals, are architected materials designed to manipulate sound waves or phonons in gases, liquids, and solids. By tailoring effective parameters such as
Acoustic_metamaterial
Movement of charge carriers with negligible scattering
acoustic phonon (emission and absorption) scattering length, λ o p , e m s {\displaystyle \lambda _{\mathrm {op,ems} }} is the optical phonon emission
Ballistic_conduction
acoustic impedance caused by the acoustic cavity (the etching trenches). Phonon crystal tether is a promising way to restrain the acoustic wave propagation
Anchor_losses
Formal constraint in quantum mechanics
in relaxation of the selection rules and appearance of these unexpected phonon modes in the spectra. Therefore, the appearance of new modes in the spectra
Selection_rule
Feature observed in spectroscopy
spectrum's co-domain. Fano resonance Holtsmark distribution Zero-phonon line and phonon sideband In statistics Lorentzian (Cauchy) and Gaussian functions
Spectral_line_shape
Scientific field of study
(gas, liquid, solid), Bose–Einstein condensate, Electrical conduction, Phonon, Magnetism, Self-organization, Semiconductor, superconductor, superfluidity
Physics
Iranian-American mechanical engineer
full professor in 1992. Kaviany's work on lattice vibrations addresses phonon scattering, mean free paths, and thermal conductivity in crystalline and
Massoud_Kaviany
Proposed quantum computer implementation
quantized into phonons by the energy eigenstates of the ion strand, which are called the center of mass vibrational modes. A single phonon's energy is given
Trapped-ion_quantum_computer
Japanese voice actress
(in Japanese). Retrieved October 31, 2023 – via X (formerly Twitter). "Phonon". UNDER NIGHT IN-BIRTH II Sys:Celes Official Web Site. Arc System Works
Saori_Ōnishi
Electromagnetic waves that travel along an interface
have negative permittivity at certain infrared wavelengths related to phonons rather than plasmons (so-called reststrahlen bands). The resulting waves
Surface_plasmon_polariton
Chemical compound – an oxide of copper with formula Cu2O
Semiconductor diodes Phonoritons ("a coherent superposition of exciton, photon, and phonon") The lowest excitons in Cu2O are extremely long lived; absorption lineshapes
Copper(I)_oxide
Spin 1 quasiparticle; quantum of a spin wave
waves and create additional non-equilibrium magnons which thermalize into phonons. At a critical density, a condensate is formed, which appears as the emission
Magnon
extended to model inelastic scattering mechanisms involving phonons and magnons. The frozen phonon multislice method (FPMS) was developed to simulate the impact
Multislice
absorption (NIA), nuclear resonant inelastic x-ray scattering (NRIXS), and phonon assisted Mössbauer effect. In the experimental setup, X-rays are released
Nuclear resonance vibrational spectroscopy
Nuclear_resonance_vibrational_spectroscopy
Quasiparticle used to model vibrations within proteins
acts through a phonon coupling effect to distort the structure of the α-helix, while the helical distortion reacts again through phonon coupling to trap
Davydov_soliton
Audible vibration that travels via pressure waves in matter
The same theoretical effect is also discussed in the context of phonons; see Phonon#Predicted properties. A non‑homogeneous medium is one in which the
Sound
American electrical engineer
experimental evidence of electron-phonon coupling in solids and made measurements that aided the theories of phonon drag and superconductivity. Many of
Warren_P._Mason
Quantum-mechanical version of computer memory
be maintained at around 89%. Diamond has very high Raman gain in optical phonon mode of 40 THz and has a wide transient window in a visible and near-infrared
Quantum_memory
Collective excitation in aperiodic materials
to quasicrystals. Similar to phonons, phasons are quasiparticles associated with atomic motion. However, whereas phonons are related to the translation
Phason
Physics term for multiple concepts
Quasiparticles Anyon Davydov soliton Dropleton Exciton Fracton Hole Magnon Phonon Plasmaron Plasmon Polariton Polaron Roton Trion Lists Baryons Mesons Particles
Exotic_matter
Experimental technique to determine the distribution of electrons in solids
electron-electron correlations, electron-phonon (more generally, electron-boson) interaction, active phonon energies, and quasiparticle lifetimes. In
Angle-resolved photoemission spectroscopy
Angle-resolved_photoemission_spectroscopy
American-Hungarian physicist
Bron, W. E.; Juhasz, T.; Mehta, S. (3 April 1989). "New nonequilibrium phonon state". Physical Review Letters. 62 (14): 1655–1658. Bibcode:1989PhRvL.
Tibor_Juhasz
State of matter of many bosons
expanded to any kind of ensemble of massless non-interacting bosons. The phonon gas, also known as Debye model, is an example where the normal modes of
Bose_gas
have an effect on the appearance of the Reststrahlen band. These include phonon band-gap, particle/grain size, strongly absorbing compounds, compounds with
Reststrahlen_effect
Type of massless subatomic particle
amplitudes make such amplitudes vanish ("Adler zeros"). In fluids, the phonon is longitudinal and it is the Goldstone boson of the spontaneously broken
Goldstone_boson
Concept in non-equilibrium physics
Superparamagnet Ferromagnet Antiferromagnet Metamagnet Spin glass Quasiparticles Phonon Exciton Plasmon Polariton Polaron Magnon Roton Soft matter Amorphous solid
Keldysh_formalism
Indian physicist
dynamical correlation function for the above systems. His theory of phonon-phonon interaction in solids provides for the first time both thermodynamic
K_N_Pathak
Degree of concentration of countable objects
the degree of concentration of countable objects (particles, molecules, phonons, cells, galaxies, etc.) in physical space: three-dimensional volumetric
Number_density
PHONON
PHONON
PHONON
PHONON
Boy/Male
Hindu
Language of God
Boy/Male
British, English
Highborn and Renowned
Girl/Female
English American
Winged.
Male
English
Short form of English Robert, BOB means "bright fame."Â
Girl/Female
Indian
A Wish in Our Mind; What My Heart Says I do
Male
Swiss
, Christian.
Boy/Male
Australian, Czech, Czechoslovakian, German, Polish
Manly; Brave; Strong; Masculine
Girl/Female
Tamil
Faith can also mean desire to achieve
Boy/Male
Biblical
Opening.
Girl/Female
British, English, French, Latin
Dove
PHONON
PHONON
PHONON
PHONON
PHONON