de Haas and Biermasz found that the mean free path of these, in small samples, is governed by the sample width and determines the thermal conductivity of the specimen.
de Haas and Biermasz found that the mean free path of these, in small samples, is governed by the sample width and determines the thermal conductivity of the specimen. Three of them can have nontrivial interactions in which the momentum vectors do not sum to zero, but instead to a reciprocal lattice vector.  These are known as umklapp processes and determine thermal resistivity when sample size is not a limiting factor. Debye's model for their density of states reproduces the Dulong and Petit specific heat at high temperatures, and was improved by Einstein. For ten points, what are these quasiparticles arising from lattice vibration?
de Haas and Biermasz found that the mean free path of these, in small samples, is governed by the sample width and determines the thermal conductivity of the specimen.
Phonons