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- W1975696427 abstract "Using a multiparticle Monte Carlo method, a theoretical analysis of the spectral density of velocity fluctuations in semiconductors has been performed, under both stationary and transient conditions (when the electric field applied to a semiconductor changes). In the case of the transient analysis a general method has been developed and applied to N-type GaAs and InP. The results obtained are interpreted in terms of the microscopic processes occurring during the transient. Significant differences between these materials have been observed. The following results were found: (i) The main source of noise is the presence of carriers in the Γ valley subject to the action of high fields, and the velocity-disorienting effect of the intervalley mechanisms; (ii) the maximum in the spectral density is essentially due to the presence of intervalley mechanisms; (iii) the dominant frequencies in the spectral density are strongly affected by the duration of the free flights; (iv) for long times, the transient spectral density converges on the steady-state one of the final field." @default.
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- W1975696427 date "1992-09-15" @default.
- W1975696427 modified "2023-10-03" @default.
- W1975696427 title "Analysis of the transient spectral density of velocity fluctuations in GaAs and InP" @default.
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- W1975696427 doi "https://doi.org/10.1063/1.351574" @default.
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