<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Hi<br>I want to know if espresso can do charged vacancy calculation or not? I know about isolated atoms but I am not sure about big bulk supercell?<br>If it can, how we can put the charge on the right position of the vacancy(which constraint should we introduced)?<br>another question, Could anyone introduced me some reference about screening effect around the point defect?<br>thanks a lot<br><br>Ali Kazempour<br>
Physics department, Isfahan University of Technology<br>
84156 Isfahan, Iran. Tel-1: +98 311 391 3733<br>
Fax: +98 311 391 2376 Tel-2: +98 311 391 2375</td></tr></table><br>