The total momentum of these particles is changed in Umklapp scattering processes, in which the incoming pair have wave vectors whose sum lies outside the first Brillouin zone.
The total momentum of these particles is changed in Umklapp scattering processes, in which the incoming pair have wave vectors whose sum lies outside the first Brillouin zone. The dependence of the critical temperature for superconductivity on the isotopic mass showed that they mediate the formation of Cooper pairs. They can be created or destroyed in inelastic scattering of light via Brillouin or Raman scattering, which involve the acoustic and optical subtypes, respectively. The T cubed law for heat capacities was derived by Debye using a model based on these quasiparticles, incorporating the finite number of elastic modes in a finite solid. FTP, name these quanta of lattice vibrations.
The total momentum of these particles is changed in Umklapp scattering processes, in which the incoming pair have wave vectors whose sum lies outside the first Brillouin zone.
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