- In
crystalline materials,
Umklapp scattering (also U-process or
Umklapp process) is a
scattering process that
results in a wave
vector (usually written...
- as they
travel through the material.
These scattering mechanisms are:
Umklapp phonon-phonon scattering, phonon-impurity scattering, phonon-electron scattering...
-
atoms in a
crystal lattice.
Peierls explored—and named—the
phenomenon of
umklapp scattering. He
submitted this work as his
DPhil thesis, Zur kinetischen...
- or
Umklapp scattering.
Umklapp phonon-phonon
scattering exchanges momentum with the
crystal lattice, so
phonon momentum is not conserved, but
Umklapp processes...
-
direction of
energy transport. Therefore,
these processes are also
known as
Umklapp (U)
processes and can only
occur when
phonons with
sufficiently large q-vectors...
-
temperatures is
dominated by electron–electron
scattering in
combination with
umklapp scattering. For a
Fermi liquid, the
resistivity from this
mechanism varies...
- can
change by
interacting with the
atoms of a
crystal — for
example in
Umklapp processes. Quasimomentum, however, is
conserved in a
perfect crystal. Time...
- that are not
considered here (e.g.
remote interface phonon scattering,
Umklapp scattering). To get
these characteristic scattering rates, one
would need...
- L} . When L {\displaystyle L} is
larger than the
phonon mean free path,
Umklapp scattering process limits thermal conductivity (regime of
diffusive thermal...
-
intermediate hole doping; his
research group focused on the role of
enhanced Umklapp scattering in a
nearly half-filled band as key to the
unexpected features...
