impurity scattering

impurity scattering

[im′pyu̇r·əd·ē ¦skad·ə·riŋ]
(solid-state physics)
Scattering of electrons by holes or phonons in the crystal.
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References in periodicals archive ?
where [[tau].sub.I] is the phonon impurity scattering relaxation time [31].
In this work, three kinds of phonon scattering are considered: impurity scattering, U scattering, and boundary scattering.
To verify our MC model and determine the value of the impurity scattering parameter Bi, the bulk thermal conductivities of the three SiC polytypes were calculated and are given in Figure 9.
This increase is due to the quasi-elastic nature of the acoustic scattering and ionized impurity scattering (Jacoboni, 1989).
Combined with the innovations described in (1), which improve mobility by suppressing impurity scattering, these techniques allowed drive currents to be increased by 22% for NMOS and 31% for PMOS, compared to 65nm nodes from NEC Electronics.
Doping and alloying are widely used to explore novel high performance materials [9], and the natural materials are rarely pure; thus the study of impurity scattering contributing to phonon relaxation time is important.
The last term represents the extrinsic scattering such as boundary scattering and impurity scattering.
Because of high purity of the Mo film, the contribution made by the impurity scattering can be neglected [16].