"$negfionizedimpurity" 修訂間的差異
出自 DDCC TCAD TOOL Manual
| 行 5： | 行 5： | ||
$negfionizedimpurity |
$negfionizedimpurity |
||
| − | + | doping_density (S and D) doping_density (channel) channel_initial channel_final |
|
Example: |
Example: |
||
於 2018年7月30日 (一) 11:13 的修訂
$negfionizedimpurity is the command to setup the related parameters of ionized impurity scattering.
The equation of ionized impurity scattering:
![W_{imp}(k)=4\pi F(\frac{2k}{\lambda})^{2}[\frac{1}{\sin^2(\frac{\theta}{2})+(\frac{\lambda}{2k})^2}]^{2}](/mediawiki/images/math/6/6/8/6687c83c4a4989a497a8373d0f59c360.png)
![F=\frac{1}{\hbar}[\frac{Ze^{2}}{\epsilon}]^{2}\frac{N_{1D}(E_{k})}{32k^{4}}N_{I}](/mediawiki/images/math/a/f/a/afa443190ef1e46e78f3fcf8a754f3e8.png)
$negfionizedimpurity doping_density (S and D) doping_density (channel) channel_initial channel_final
Example:
$negfionizedimpurity 1.0e0 1.0e24 300 400
In this case we have 681 mesh grids from drain(left) to source(right), and the position of channel is from 300 to 400. The doping concentration for source and drain is 
, and that for channel is 
.
related commands:
$ifsolvenegf, $negfifscattering
