<div dir="ltr">Hello <br> I'm trying to use Quantum Espresso to perform a PAW
calculation. Does any one have some examples I can run to make sure my
installation is working right? I'm using version 4.0.1 and this is what
I have done so far: <br>
<br> I was trying to make a Bulk Copper Calculation to determine the lattice constant.<br><br> 1) I generated the Cu paw potential using the input file in /atomic_doc/paw_library/input <br><br> 2) Run pwscf.x with this pseudopotential, 1 atom per u.c. ibrav = 2 ecutwfc = 25 ecutrho=4*ecutwfc<br>
<br> 3) pwscf.x exited with a segmentation fault while reading the
potential, the problem, the two scalars nqlc and nwfc, the vector lll,
and the matrix dion were not writen into the UPF file when generated.
So I modified pwscf to fill these values while reading the potential.<br>
<br> 4) vary the lattice constant and plot energy vs lattice
constant. problem: by varying the lattice constant I don't get a smotth
surface like in the case of ultrasoft pseudopotential in the same
lattice constant range.<br>
<br> 5) Increase the ecutwfc, to 30, 50, 75 and 90. Same noise plots were obtained.<br><br>
What would you recomend to do next? or what do you think might be the
problme? What is the current state of PAW in version 4.0.1? does anyone
have a Cu paw UPF which is not incomplete?<br>
<br>Best Regards<br>Jesus Cruz<br>ILP Georgetown University</div>