'Phonons and resonances in solids' -- subject(s): Lattice
dynamics, Phonons, Solids, Spectra
'Note di vita militare' -- subject(s): Biography, History,
Soldiers
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sound and other mechanical vibrations are quantized as bosonic
particles called phonons.
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The temperature dependence of resistivity (or its reciprocal,
conductivity) can only be truly understood with quantum mechanics.
In the same way that matter is an assembly of microscopic particles
called atoms and a beam of light is a stream of microscopic
particles called photons, thermal vibrations in a solid are a swarm
of microscopic particles called phonons. The electrons are trying
to drift toward the positive terminal of the battery, but the
phonons keep crashing into them. The random direction of these
collisions disturbs the attempted organized motion of the electrons
against the electric field. The deflection or scattering of
electrons with phonons is one source of resistance. As temperature
rises, the number of phonons increases and with it the likelihood
that the electrons and phonons will collide. Thus when temperature
goes up, resistance goes up, and conductivity goes down
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Sound is, at its basic level, the motion of moving particles. In
the quantum mechanical picture, energy of vibration of atoms or
molecules is described as phonons. Phonons are a quanta (packet) of
energy that can be treated as a particle (matter).
At the full level, it is mechanical or material waves that is an
oscillation of pressure.
In others words, yes and no.
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Optical phonons are phonon polarization modes with a minimum
frequency, regardless of wavelength, which occur in crystals with
more than one atom per primitive cell.
Primitive cell is the early technological development....