Relaxation time approximation forelectron - phonon interaction insemiconductorsPeter
نویسندگان
چکیده
A Boltzmann equation for semiconductors is considered. Physical assumptions include the parabolic band approximation and a new relaxation time model for electron-phonon interaction. Thermal equilibrium distributions for this scattering mechanism are products of Maxwellian distributions with periodic functions of the energy, where the period is the energy of a phonon. The hydrodynamic limit is considered and a drift-diiusion model is derived by formal asymptotic methods.
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