$negfifmaterial

$negfifmaterial is the command to setup the material structure.You can also use this function and choose the material with our GUI version at the place of "Channel Material" in GUI

 $negfifmaterial
 material index

Example:

 $negfifmaterial
 2

The solver has an ability to calculate Si and GaAs.
material 1: GaAs
material 2: Si
Note: The program is extendable for considering other materials.
related commands:

 $ifsolvenegf