<br />
Dear Prof Victor<br />
My problem is to calculate the band gap at optimized lattice constant using SCAN functional.<br />
> May I suggest you to elaborate a 2D grid or even a multidimensional grid...<br />
I'll try first to perform geometry optimization for different rmt's,ifft factors in addition to different rkmax and k-points.(correct me if i was wrong in interpreting your suggestion).<br />
Thanks<br />
Sandeep<br />
<br />
<br />
if that is required and examine your main property in the nodes of the<br />
<br />
grid?<br />
<br />
On Fri, 29 Jun 2018 14:22:06 +0530 Víctor Luaña Cabal <victor@fluor.quimica.uniovi.es> wrote<br />
>* sandeep arora <sndp.arora@rediffmail.com> [2018-06-29 06:44:48 +0000]:<br />
<br />
> Dear wien2k users<br />
<br />
> I want to use scan exchange correlation for optimization of binary semiconductors(GaP).But the lattice constant varies with Rkmax at third decimal place even on increasing rkmax up to 11 and increasing ifft enhancement factor up to 4 in case.in0.although the E-V graph is smooth. Please suggest some solution to converge the lattice constant with rkmax.<br />
<br />
> the results obtained are<br />
<br />
> RK <br />
<br />
> 8.0 5.4663<br />
<br />
> 8.5 5.4651<br />
<br />
> 9.5 5.4642<br />
<br />
> 10.0 5.4633<br />
<br />
<br />
<br />
Sandeep,<br />
<br />
<br />
<br />
When you have a problem in which several factors are relevant I prefer<br />
<br />
exp0loring the several variables that are relevant, You are interested<br />
<br />
in the band gap and your exploration so far shows that geometry is most<br />
<br />
relevant.<br />
<br />
<br />
<br />
May I suggest you to elaborate a 2D grid or even a multidimensional grid<br />
<br />
if that is required and examine your main property in the nodes of the<br />
<br />
grid? For instance the distance variable provides a relevant range from<br />
<br />
4.5 to 6.0, the RK grid range from 7 to 10, maybe, and so on.<br />
<br />
<br />
<br />
That would be my way of exploring your problem, if I was able to explain<br />
<br />
my idea.<br />
<br />
<br />
<br />
Thanks,<br />
<br />
Víctor Luaña<br />
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