<div dir="ltr"><div>I do not know the correct structure of monolayer GeSe. However, after a quick Google search, I find for example</div><div>this paper</div><div><a href="https://journals.aps.org/prmaterials/abstract/10.1103/PhysRevMaterials.5.024002">https://journals.aps.org/prmaterials/abstract/10.1103/PhysRevMaterials.5.024002</a></div><div>If this is the structure you're looking for, the input structure is wrong in that you have only two atoms in the unit cell</div><div>sharing the same z coordinate. So, you're plotting the band structure of a perfectly flat monolayer.</div><div><br></div><div>The other parameters you mention, such as k-point grid, could affect a band structure only if you use</div><div>settings bringing it to a very approximate ground state. I would not say that this is your case.</div><div><br></div><div>Be careful: you're using PAW pseudopotentials for which the default setting ecutrho = 4 * ecutwfc might not be enough, usually</div><div>settings from 8 to even 12 ecutwfc are required.</div><div>Giovanni</div><div><br></div><div><br></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><span style="color:rgb(0,0,0)">-- <br><br>Giovanni Cantele, PhD<br>CNR-SPIN<br>c/o Dipartimento di Fisica<br>Universita' di Napoli "Federico II"<br>Complesso Universitario M. S. Angelo - Ed. 6<br>Via Cintia, I-80126, Napoli, Italy<br><a href="mailto:giovanni.cantele@spin.cnr.it" style="color:rgb(17,85,204)" target="_blank">e-mail: giovanni.cantele@spin.cnr.it</a><br>Phone: +39 081 676910<br>Skype contact: giocan74<br><br>ResearcherID: <a href="http://www.researcherid.com/rid/A-1951-2009" style="color:rgb(17,85,204)" target="_blank">http://www.researcherid.com/rid/A-1951-2009</a><br>Web page: </span><a href="https://sites.google.com/view/giovanni-cantele/home" style="color:rgb(17,85,204)" target="_blank">https://sites.google.com/view/giovanni-cantele/home</a><br></div></div></div><br></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">Il giorno lun 16 dic 2024 alle ore 22:38 Saim Egemen YÜCEL <<a href="mailto:20290601@ogrenci.ankara.edu.tr">20290601@ogrenci.ankara.edu.tr</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div style="font-family:arial,helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"><div><img src="cid:ii_193d5fec2299f7c33d21" width="668" height="501"></div><div><div>Hi everyone, I am an undergraduate student currently learning to use Quantum ESPRESSO for my research project, and I am encountering some issues with my band structure calculations. I would greatly appreciate your guidance as I am very new to this software and eager to learn.</div><div><br></div><div>Background:</div><div>I am working on the band structure of Ge and Se using the PBE-N-KJPAW pseudopotentials. Here are the specifics of my setup:</div><div>Pseudopotentials: PBE-N-KJPAW for both Ge and Se.</div><div>K-point mesh for SCF: 12x12x1</div><div>K-point mesh for NSCF: 24x24x1</div><div><br></div><div>Problem:</div><div>Despite trying different types of pseudopotentials, the band structure graph I obtain does not appear to match the expected results from literature or other computational models. I have attached both the resulting graph and the input/output.</div><div><br></div><div><div>Questions:</div><div>Could the issue be related to the choice of pseudopotentials or their compatibility with the elements I'm studying?</div><div>Might there be an error in my k-point selection or path for the band structure calculation?</div><div>Are there specific parameters in the input files that I might have overlooked or set incorrectly?</div><div><br></div><div>Sincerely,</div><div>Egemen.</div><div>QE-version: 7.0</div></div></div></div><p><span style="font-size:10px"><span style="font-family:"Times New Roman",Times,serif"><strong>YASAL UYARI</strong>: Bu e-posta mesajı ve onunla iletilen tüm ekler, gönderildiği kişi ya da kuruma özel olup içerik ve ekinde bulunan tüm bilgi ve görüşler sadece adres yazarına aittir ve Ankara Üniversitesi’nin resmi görüşünü yansıtmayabilir. Mesaj size yanlışlıkla ulaşmışsa mesaj içeriğini ya da eklerini yürürlükteki kanunlara aykırı olarak kullanmayınız, kopyalamayınız, yaymayınız, başka kişilere yönlendirmeyiniz ve mesajı gönderen kişiyi derhal e-posta yoluyla haberdar ederek, bu mesajı ve eklerini herhangi bir kopyasını muhafaza etmeksizin siliniz. Bu e-posta içeriğindeki bilgilerin kullanılması veya verebileceği muhtemel zararlar nedeniyle Ankara Üniversitesi hiç kimseye karşı sorumlu tutulamaz.<br>
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