檢視 $useaffinity 的原始碼

$useaffinity = $1daffinity
The program used the band offset ratio to calculate the energy difference between two materials. However, the user can use the affinity command to override the use of band offset ratio 

For two different materials,the <math>\Delta Ec =  offset_{ratio}\times (Eg_{A}-Eg_{B} ) </math>. It will be changed to <math>\Delta Ec = ( \chi_{A}-\chi_{B}) </math>
Using the affinity can overcome the program where two materials have the same bandgap but different electron affinity.


 $useaffinity
 <math>\chi_{1} </math>
 <math>\chi_{2} </math>
 <math>\chi_{3}</math>
 <math>\chi_{4} </math>
 <math>\chi_{5} </math>
 .. .. ..
 <math>\chi_{N} </math>

<big>'''The $useaffinity setting for 1D-DDCC in GUI interface '''</big> <br>

[[檔案:1d_$useaffinity_fig1.jpg|1300px]]<br>