Read e-book online Handbook of Numerical Analysis. Special Volume: Numerical PDF

By W.H.A. SCHILDERS, E.J.W. TER MATEN, Philippe G. Ciarlet

ISBN-10: 0080459153

ISBN-13: 9780080459158

ISBN-10: 0444513752

ISBN-13: 9780444513755

This specified quantity presents a large assessment and perception within the manner numerical equipment are getting used to unravel the wide range of difficulties within the electronics undefined. in addition its target is to offer researchers from different fields of software the chance to profit from the implications wich were acquired within the electronics undefined. * whole survey of numerical tools utilized in the digital * each one bankruptcy is selfcontained * offers cutting-edge functions and techniques * the world over regarded authors

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Read Online or Download Handbook of Numerical Analysis. Special Volume: Numerical methods in electromagnetics PDF

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Additional info for Handbook of Numerical Analysis. Special Volume: Numerical methods in electromagnetics

Sample text

J = 0. 47) Recently, there is an increased interest in currents in insulating materials. 9 eV and therefore acts as a perfect insulator for normal voltage operation conditions around 3 V and using 60 Å thick oxides. However, the continuous down scaling of the transistor architecture requires that the oxides thicknesses are also reduced. With the current device generation (100 nm gate length), the oxide thickness should be less than 20 Å. For these thin layers, direct tunneling through the layer barrier becomes a dominating current leakage in integrated CMOS devices.

In particular, the temperature, T , conjugated to the internal energy of the system and the chemical potential, µ, conjugated to the number of particles in the systems are constant for a system in equilibrium. Therefore, if the dopant distribution varies in the device and the distance between the chemical potential and the band edges is modulated, then for the device being in equilibrium, the band edges must vary in accordance with the dopant variations, as illustrated in Fig. 1. 6. Currents in semiconductors Whereas in metals the high conductivity prevents local charge accumulation at an detectable time scale, the situation in semiconductors is quite different.

For the above results we obtained J(diffusive part) ∝ µ∇T . 38) the difference being a term ξ= ∂ log µ(T ) . 39) Stratton’s model is usually referred to as the energy transport model. For the semiconductor environment, the Scharfetter–Gummel scheme provides a means to discretize the current equations on a grid (S CHARFETTER and G UMMEL [1969]). 40) where the plus (minus) sign refers to negatively (positively) charged particles and c denotes the corresponding carrier density. It is assumed that both the current J and the electric field E are constant along a link and that the potential V varies linearly along the link.

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Handbook of Numerical Analysis. Special Volume: Numerical methods in electromagnetics by W.H.A. SCHILDERS, E.J.W. TER MATEN, Philippe G. Ciarlet


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