Abstract
We present, in a strong nonlinear context, a full-band hydrodynamic approach by using the first 13 moments of the distribution function in the framework of extended thermodynamics. Following this approach we show that: (1) the full-band effects of the band structure are described accurately up to high electric fields both in homogeneous and nonhomogeneous conditions; (2) the effectiveness of the dissipation processes can be properly investigated, in homogeneous conditions, only in a strong nonlinear context; and (3) the hyperbolicity region of the system is very large, also in the nonlinear conditions. In this way, by using a strong nonlinear closure, it is possible to describe accurately the transport phenomena in submicron devices, when very high electric fields and field gradients occur (E ≈ 220 kV/cm, E/(dE/dx) ≈ 100 Å).
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Trovato, M., Falsaperla, P. Maximum-entropy principle for nonlinear hydrodynamic transport in semiconductors. Continuum Mech. Thermodyn. 19, 511–532 (2008). https://doi.org/10.1007/s00161-008-0070-4
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DOI: https://doi.org/10.1007/s00161-008-0070-4