Dear All,<br><br> I am studying electric-enthalpy method implemented in pw.x with example31. There are some problems i cannot solve by myself.<br>Firstly, when i set "ecutrho" explictly, calculations under finite-field are failed without any complain information, such as CRASH report. My server is of 8GB memory, and no such crash for other scf calculations . I had tried 'cg' and 'david' methods, and cannot solve this problems.
<br>Secondly, when i set occupations to 'mv' smearing scheme with degauss=0.03 a.u. , the scf calculation of finite-field situation <br>is very difficult to reach convergence. I have tried to increase or decrease mixing_ndim, but failed. Besides, i have tried to increase
<br>nbnd , which seems no effect on scf convergence. Would you please give me some suggestion on parameters setting for scf calculation under finite-field ? <br><br>Thanks for your time and attention . Any suggestion or comment is appreciated .
<br><br>Best Wishes,<br>H.P<br><br><br clear="all"><br>-- <br>Hai-Ping Lan <br>Department of Electronics ,<br>Peking University , Bejing, 100871<br><a href="mailto:lanhaiping@gmail.com">lanhaiping@gmail.com</a>, <a href="mailto:hplan@pku.edu.cn">
hplan@pku.edu.cn</a>