Other methods for engineering 2DEGs are undoped channel thereby mitigating the deleterious effect of ionized impurity scattering.
2.
Impurity scattering and surface scattering are, with a fair approximation, two good examples of elastic scattering processes.
3.
Therefore impurity scattering events are mostly considered for intravalley scattering, intraband scattering and, to a minor extent, interband scattering.
4.
The effect of ionized impurity scattering, however, " decreases " with increasing temperature because the average thermal speeds of the carriers are increased.
5.
It is important to note that carrier scattering in these oxides arises primarily from ionized impurity scattering at high dopant levels ( > 1 at % ).
6.
At lower temperatures, ionized impurity scattering dominates, while at higher temperatures, phonon scattering dominates, and the actual mobility reaches a maximum at an intermediate temperature.
7.
This muddy situation possibly originated from the indirect nature of the experimental evidence, as well as experimental issues such as sample quality, impurity scattering, twinning, etc.
8.
When it is possible, analytic expression of the Matrix elements are commonly found by Fourier expanding the Hamiltonian H', as in the case of Impurity scattering or acoustic phonon scattering.
9.
If scattered carriers are in the inversion layer at the interface, the reduced dimensionality of the carriers makes the case differ from the case of bulk impurity scattering as carriers move only in two dimensions.
10.
Some elastic scattering processes are scattering from acoustic phonons, impurity scattering, piezoelectric scattering, etc . In acoustic phonon scattering, electrons scatter from state "'k "'to "'k " ", while emitting or absorbing a phonon of wave vector "'q " '.
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