- In
classical mechanics,
anharmonicity is the
deviation of a
system from
being a
harmonic oscillator. An
oscillator that is not
oscillating in harmonic...
- to an
anharmonic oscillator; the
observation of
overtones is only
possible because vibrations are
anharmonic.
Another consequence of
anharmonicity is that...
- In geometry, the cross-ratio, also
called the
double ratio and
anharmonic ratio, is a
number ****ociated with a list of four
collinear points, particularly...
-
potential is that of a "perturbed
simple harmonic oscillator" or ″pure
anharmonic oscillator″
having a
purely discrete energy spectrum. The
fourth type...
- Lyddane–Sachs–Teller
relation applicable in
crystals where the
phonons are
affected by
anharmonic damping has been
derived in Ref. and
reads as | ω LO | 2 | ω TO | 2 =...
- are
canonical basis vectors in Z d {\displaystyle \mathbb {Z} ^{d}} .
Anharmonic Hamiltonians with on-site and multiple-site
perturbations were considered...
- for
thermal conductivity in high
temperatures accordingly.
Describing anharmonic effects is
complicated because an
exact treatment as in the
harmonic case...
- Yoshiasa, A.; Koto, K.; Kanamaru, F.; Emura, S.; Horiuchi, H. (1987). "
Anharmonic thermal vibrations in wurtzite-type AgI". Acta
Crystallographica Section...
-
higher temperatures the Rayleigh-type
scattering regime is
obscured by the
anharmonic damping (typically with a ~λ−2
dependence on wavelength),
which becomes...
-
solid with just one phonon,
because the
crystal vibration is
slightly anharmonic. However, in many materials, the
elementary excitations are very close...
