Abstract
Conductivity and first-order piezoresistance coefficient π 11 are investigated in detail for strained n-type silicon crystal. As scattering system were adopted impurities and longitudinal acoustic phonons. The consideration is based on quantum kinetic equation and corresponding precise balance equation. The main point of the used method is special model of non-equilibrium distribution function. Final results for mobility of unstrained crystal and piezoresistance coefficient π 11 are compared with experimental data and consequent theoretical results obtained by another method, grounded on the wide-spread isotropic τ-approximation. The latter consists in modelling of the collision integral by the simple form which contains scalar relaxation time depending on energy. Comparison shows the substantial numerical difference between values, calculated with the help of the two mentioned methods.
Published Version
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