$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 input box 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