<DIV> </DIV>
<DIV> Dear PWSCF users</DIV>
<DIV> When I made the 'scf'of 'O',the convergence is very slow,and at last turn up 'convergence NOT achieved, stopping',my inputfile as following:</DIV>
<DIV> </DIV>
<DIV> &CONTROL<BR> title = 'O' ,<BR> calculation = 'scf' ,<BR> restart_mode = 'from_scratch' ,<BR> outdir = '/root/work/ZnO_0_0_1/O' ,<BR> wfcdir = '/root/work/ZnO_0_0_1/O' ,<BR> pseudo_dir = '/root/tool/espresso-3.2.3/pseudo/' ,<BR> prefix = 'O' ,<BR> etot_conv_thr = 0.0001 ,<BR> forc_conv_thr = 0.0001 ,<BR> /<BR> &SYSTEM<BR> ibrav = 14,<BR> A = 6.49854 ,<BR> B = 6.49854 ,<BR> C = 26.427677 ,<BR> cosAB = 0 ,<BR> cosAC = 0 ,<BR> cosBC = 0.5 ,<BR> nat = 16,<BR> ntyp = 1,<BR> ecutwfc = 30 ,<BR> ecutrho = 120 ,<BR> nosym = .true. ,<BR> occupations = 'fixed' ,<BR> degauss = 0.02 ,<BR> /<BR> &ELECTRONS<BR> mixing_mode = 'plain' ,<BR> diagonalization = 'david' ,<BR> diago_full_acc = .false. ,<BR> /<BR>ATOMIC_SPECIES<BR> O 16.00000 O.pbe-van_bm.UPF <BR>ATOMIC_POSITIONS angstrom <BR> O 1.624773263 0.573114301 0.485838289 <BR> O 3.249224094 3.822615460 0.485946263 <BR> O 4.873764156 0.573115030 0.485836746 <BR> O 3.249294779 1.804680145 2.723816512 <BR> O 1.624804430 0.573863860 13.703775132 <BR> O 3.249230400 3.823233855 13.703791642 <BR> O 4.873742964 0.573863275 13.703791170 <BR> O 3.249304260 1.805307421 15.942064019 <BR> O 6.498493290 3.822459082 0.485574395 <BR> O 4.873652639 5.054116368 2.724105761 <BR> O 6.498566063 1.804935512 2.723993591 <BR> O 8.123380444 5.054113329 2.724106775 <BR> O 6.498495372 3.823229705 13.703092130 <BR> O 4.873728849 5.054758560 15.941611312 <BR> O 6.498573263 1.805673494 15.941687153 <BR> O 8.123315037 5.054760018 15.941598059 <BR>K_POINTS automatic <BR> 1 1 1 0 0 0 </DIV>
<DIV>What should I do ?</DIV>
<DIV>Thanks for your advice!</DIV>
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