<div dir="ltr"><div><div>Hi Tommaso,<br><br></div>for every perturbation the run should restart from the potential (and wavefunctions) of the uperturbed run. So you need to save the scratch directory of the latter and copy it to the one used by the perturbed run before each calculation. This should be evident from the tutorial files. Also make sure that diago_thr_init (the threshold for the diagonalization of the Hamiltonian at each step) is set equal to the value it had at the last iteration of the unperturbed run, so that the diagonalization at the first iteration of the perturbed run is equally ccurate. Hope this is not confusing.<br>
<br></div>best,<br><br>Matteo<br><br><br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, May 15, 2014 at 11:16 PM, Tommy <span dir="ltr"><<a href="mailto:neutrinofrancese@gmail.com" target="_blank">neutrinofrancese@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><div style="font-family:Calibri,sans-serif;font-size:11pt">Thanks to both Giuseppe Mattioli and Pang Gui for their help!!! <br>
However, I need to ask one more question about the process for obtaining Hubbard coefficients: I follow the tutorials posted with the links, but a thing wasn't clear to me. After scf simple calculation, I need to "perturb" the system in a range between -0.1 & 0.1 eV. But: do i need to save a file for every perturbation induced to the system?<br>
How can i set to QE to take every previous result and compute the U term?<br>Be patient, but I'm alone and i trying to do the best for my thesis!!!<br>Best regards,<br>Tommaso.<br></div></div></div><br>_______________________________________________<br>
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