Impact of Electron Heat Conductivity on Electron Energy Flux


IEICE TRANSACTIONS on Electronics   Vol.E86-C   No.3   pp.320-324
Publication Date: 2003/03/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on the 2002 IEEE International Conference on Simulation of Semiconductor Processes and Devices (SISPAD'02))
hydrodynamic,  energy flux,  Monte Carlo,  

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The validity of the expression for the electron energy flux is evaluated by using the Monte Carlo simulation. The drift, divergence, and scattering terms are directly calculated from changes in the physical values of particles. Each term composing the momentum and energy conservation equations can be reproduced by indirect calculation of the expression for the term that is a function of other physical values. However, it is found that a parameter in electron heat conductivity has to be adjusted to reproduce the direct calculation of the energy flux. Namely, the parameter of the Wiedemann-Franz law for heat conductivity should be chosen so that the underestimations of the drift and diffusion terms in the energy flux equation cancel each other. It is shown that the parameter influences the electron temperature in a 50-nm gate nMOSFET.