Transient regime of degenerate electrons via relaxation time approximation

Summary form only given. The relaxation time approximation has been used to solve the time-independent and the time-dependent Boltzmann-Vlasov equation for an electron gas whose degree of degeneration is complete or weak. The stationary and time-dependent electron distribution functions have been obtained together with density current and electrical conductivity. The relaxation time /spl tau/(E) is considered as being a function of the energy. Different kinds of functions are considered. The strong influence of different /spl tau/(E) on the distribution function and on the density current has been shown. Deviations from Ohm's law at high current densities have been analyzed.