Investigation of spurious velocity overshoot using Monte Carlo data

Grasser, T.; Kosina, H.; Selberherr, S.
September 2001
Applied Physics Letters;9/17/2001, Vol. 79 Issue 12, p1900
Academic Journal
For the simulation of state-of-the-art devices, hydrodynamic and energy transport models account for nonlocal effects. Although these models have been available for several decades, there are still unresolved issues. One of these issues is the occurrence of spurious peaks in the velocity profile which are inherent to both Stratton’s [Phys. Rev. 126, 2002 (1962)] and Blo\tekjær’s [IEEE Trans.Electron Devices 17, 38 (1970)] models. We investigate the origin of these peaks by introducing relaxation times, mobilities, and closure relations directly from a coupled Monte Carlo simulator. From these simulations, we conclude that the spurious peaks are a direct result of the truncation of the infinite moment series and the inaccuracies in the physical models. © 2001 American Institute of Physics.


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