<div dir="ltr">Dear Ganjar<div>I think it'll help you if you choose a lower value for mixing_beta and try the calculations again.</div><div><br></div><div>with regards</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">
On Fri, Nov 29, 2013 at 10:07 PM, Giuseppe Mattioli <span dir="ltr"><<a href="mailto:giuseppe.mattioli@ism.cnr.it" target="_blank">giuseppe.mattioli@ism.cnr.it</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
Dear Ganjar<br>
<div class="im"><br>
> About the parameter of pseudopotential, Prevously I have calculate<br>
> LiFeSiO4 with the same parameters that I use here and the<br>
> calculation is succesfull. But I dont know why for this case is not.<br>
<br>
</div>This is very strange... You are using norm conserving pseudopotentials<br>
(mt indicates a Martins-Troullier norm conserving pseudopotential)<br>
which should be quite hard. They should require (at least) ecutwfc >=<br>
100, but you should check the convergence wrt ecutwfc, and I would not<br>
be surprised by a final ecutwfc=140~150.<br>
<br>
HTH<br>
<br>
Giuseppe<br>
<br>
Giuseppe Mattioli<br>
ISM-CNR<br>
Italy<br>
<div><div class="h5"><br>
Quoting Ganjar Kurniawan <<a href="mailto:zargan88@yahoo.com">zargan88@yahoo.com</a>>:<br>
<br>
> Thanks for the suggestions.....<br>
> I have checked the structure using Xcrysden and then compared with<br>
> the literature. I find that there is no problem with the structure,<br>
> so I`m sure that the it is right.<br>
> About the parameter of pseudopotential, Prevously I have calculate<br>
> LiFeSiO4 with the same parameters that I use here and the<br>
> calculation is succesfull. But I dont know why for this case is not.<br>
><br>
><br>
><br>
><br>
> On Friday, 29 November 2013 4:46 PM, Vikan Manmathan<br>
> <<a href="mailto:vikanmanmathan1@gmail.com">vikanmanmathan1@gmail.com</a>> wrote:<br>
><br>
> Dear Ganjar Kurniawan,<br>
> Read the input structure first.<br>
> <a href="http://www.quantum-espresso.org/wp-content/uploads/Doc/INPUT_PW.html#id3119661" target="_blank">http://www.quantum-espresso.org/wp-content/uploads/Doc/INPUT_PW.html#id3119661</a><br>
> Try to visualize the structure before running the calculations,<br>
> using some graphical software like Xcrysden.<br>
><br>
><br>
><br>
><br>
> On Fri, Nov 29, 2013 at 1:37 PM, Axel Kohlmeyer <<a href="mailto:akohlmey@gmail.com">akohlmey@gmail.com</a>> wrote:<br>
><br>
> On Fri, Nov 29, 2013 at 8:20 AM, Ganjar Kurniawan <<a href="mailto:zargan88@yahoo.com">zargan88@yahoo.com</a>> wrote:<br>
>>> Dear QE user...<br>
>>> I`m trying to optimize geometry of Li2FeSiO4 structure using 'relax', but<br>
>>> the result said that the " convergence NOT achieved after 100 iterations:<br>
>>> stopping ". I have used the atomic position from the literature.<br>
>>> here it is the input that i use<br>
>><br>
>> hmm... you seem to be using norm-conserving pseudopotentials, but use<br>
>> wavefunction/density cutoff values that are commonly used for<br>
>> ultra-soft pseudo-potentials. is there are specific reason for this?<br>
>><br>
>> axel.<br>
>><br>
>><br>
>><br>
>>> &CONTROL<br>
>>> calculation = 'relax',<br>
>>> restart_mode = 'from_scratch',<br>
>>> nstep = 50<br>
>>> outdir = '/home/ganjar/Li2FeSiO4/pmn21/normal/relax'<br>
>>> pseudo_dir = '/share/apps/espresso-5.0.2/pseudo',<br>
>>> prefix='files_lar'<br>
>>> tprnfor = .true.<br>
>>> tstress = .true.<br>
>>> etot_conv_thr = 1.0D-4, forc_conv_thr = 1.0D-2<br>
>>> /<br>
>>> &SYSTEM<br>
>>> ibrav=0, a = 6.3219, b = 5.3935, c = 4.9939, cosAB = 0, cosAC = 0, cosBC =<br>
>>> 0, nat = 16, ntyp = 4, ecutwfc = 30, ecutrho = 240,<br>
>>> occupations = 'smearing', smearing='marzari-vanderbilt', degauss= 0.015,<br>
>>> nspin=1<br>
>>> /<br>
>>> &ELECTRONS<br>
>>><br>
>>> conv_thr = 1.0D-8<br>
>>> diagonalization = 'david', mixing_beta = 0.7, startingpot = 'atomic',<br>
>>> startingwfc = 'random', tqr = .true.<br>
>>> /<br>
>>> &IONS<br>
>>> ion_dynamics = 'bfgs'<br>
>>> /<br>
>>> ATOMIC_SPECIES<br>
>>> Li 6.9410 Li.pbe-mt_fhi.UPF<br>
>>> Fe 55.847 Fe.pbe-mt_fhi.UPF<br>
>>> Si 28.085 Si.pbe-mt_fhi.UPF<br>
>>> O 15.999 O.pbe-mt_fhi.UPF<br>
>>> CELL_PARAMETERS alat<br>
>>><br>
>>> 1.000 0.000 0.000<br>
>>> 0.000 1.000 0.000<br>
>>> 0.000 0.000 1.000<br>
>>><br>
>>> ATOMIC_POSITIONS alat<br>
>>><br>
>>> Li 0.2498 0.3307 0.8023<br>
>>> Li 0.2501 0.6693 0.3023<br>
>>> Li 0.7498 0.6693 0.3023<br>
>>> Li 0.7501 0.3307 0.8023<br>
>>> Fe 0.5000 0.8261 0.7960<br>
>>> Fe 0.0000 0.1738 0.2960<br>
>>> Si 0.0000 0.8297 0.8112<br>
>>> Si 0.5000 0.1702 0.3112<br>
>>> O 0.2145 0.6849 0.7013<br>
>>> O 0.2854 0.3150 0.2013<br>
>>> O 0.7145 0.3150 0.2013<br>
>>> O 0.7854 0.6849 0.7013<br>
>>> O 0.0000 0.1231 0.7118<br>
>>> O 0.5000 0.8768 0.2118<br>
>>> O 0.5000 0.1794 0.6417<br>
>>> O 0.0000 0.8205 0.1417<br>
>>><br>
>>> K_POINTS automatic<br>
>>> 2 4 4 0 0 0<br>
>>><br>
>>> what wrong with my input???<br>
>>> anybody can correct it??<br>
>>><br>
>>> Best regard<br>
>>> Ganjar Kurniawan<br>
>>> Bandung Institute of Technology, Indonesia<br>
>>><br>
>>><br>
>>><br>
>>> _______________________________________________<br>
>>> Pw_forum mailing list<br>
>>> <a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
>>> <a href="http://pwscf.org/mailman/listinfo/pw_forum" target="_blank">http://pwscf.org/mailman/listinfo/pw_forum</a><br>
>><br>
>><br>
>><br>
>> --<br>
>> Dr. Axel Kohlmeyer <a href="mailto:akohlmey@gmail.com">akohlmey@gmail.com</a> <a href="http://goo.gl/1wk0" target="_blank">http://goo.gl/1wk0</a><br>
>> International Centre for Theoretical Physics, Trieste. Italy.<br>
>><br>
>> _______________________________________________<br>
>> Pw_forum mailing list<br>
>> <a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
>> <a href="http://pwscf.org/mailman/listinfo/pw_forum" target="_blank">http://pwscf.org/mailman/listinfo/pw_forum</a><br>
>><br>
><br>
><br>
> --<br>
><br>
> NANDHA KUMAR V.<br>
> Research scholar,<br>
><br>
> IISER, PUNE.<br>
><br>
><br>
> _______________________________________________<br>
> Pw_forum mailing list<br>
> <a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
> <a href="http://pwscf.org/mailman/listinfo/pw_forum" target="_blank">http://pwscf.org/mailman/listinfo/pw_forum</a><br>
<br>
<br>
</div></div>--<br>
********************************************************<br>
- Article premier - Les hommes naissent et demeurent<br>
libres et ègaux en droits. Les distinctions sociales<br>
ne peuvent être fondèes que sur l'utilitè commune<br>
- Article 2 - Le but de toute association politique<br>
est la conservation des droits naturels et<br>
imprescriptibles de l'homme. Ces droits sont la libertè,<br>
la propriètè, la sùretè et la rèsistance à l'oppression.<br>
********************************************************<br>
<span class="HOEnZb"><font color="#888888"><br>
Giuseppe Mattioli<br>
CNR - ISTITUTO DI STRUTTURA DELLA MATERIA<br>
v. Salaria Km 29,300 - C.P. 10<br>
I 00015 - Monterotondo Stazione (RM)<br>
Tel + 39 06 90672836 - Fax +39 06 90672316<br>
E-mail: <<a href="mailto:giuseppe.mattioli@ism.cnr.it">giuseppe.mattioli@ism.cnr.it</a>><br>
</font></span><div class="HOEnZb"><div class="h5"><br>
_______________________________________________<br>
Pw_forum mailing list<br>
<a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
<a href="http://pwscf.org/mailman/listinfo/pw_forum" target="_blank">http://pwscf.org/mailman/listinfo/pw_forum</a></div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><font color="#999999">Zahra Vatankhah</font><div>
<font color="#999999">M.S. student of solid state physics </font></div><div><i><font color="#666666"><br></font></i></div>
</div>