Dear Prof:
  We have some questions about build lower doping concentration structure in TKAtoms program, as following;
Q1: The TKATOM program can build up doping structure for
       lower doping concentration (below 10%) or not?
Q2: If it can work, how should we build up the doping site?
Q3: For lower doping case, how do these doped atoms choose where
       to go in TKATOM program, is it have physical description?
 
ps: The attach ppt. file show more detail about our questions.
 
Thanks for helping!
Pei-chang Tsai
  

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