<div dir="ltr"><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Hello fellow QE users and developers,<br></div><div dir="ltr"><div><br></div><div>I am new to Quantum Espresso and I am doing spin-polarized DFT calculations on adsorption energy. I am using BURAI 1.3 GUI to aid in my QE setup thus I am not sure of the QE version that I am using. I am trying to do optimization on the hydrogen atom on the bimetallic slab (see attached input file). I have already employed several tweakings since the calculations never converged, such as:</div><div><br></div><div>- changed the mixing_mode to "local-TF" since it is suited for inhomogeneous system like my slab system</div><div>- lowering the mixing_beta to 0.1</div><div>- changing the ecutrho, ecutwfc, and starting_magnetization to the ones recommended by this website: <a href="http://www.materialscloud.org/work/tools/qeinputgenerator" target="_blank">http://www.materialscloud.org/work/tools/qeinputgenerator</a></div><div><br></div><div>These tweakings are made based on what I have read so far in this forum. After calculations, the slab-adsorbate system didn't achieve convergence in optimization, as seen in attached pics in this link:</div><div><br></div><div><a href="https://1drv.ms/u/s!AsOu46EeV98P9neMR6RenPHWvmKY?e=5G5DnP">https://1drv.ms/u/s!AsOu46EeV98P9neMR6RenPHWvmKY?e=5G5DnP</a> </div><div><br></div><div>It seems that the results per iteration is oscillating. Manganese in this system seems to be problematic since when I tried replacing Mn with other metals (e.g. Fe and Co in particular), it reaches convergence and becomes optimized. I don't know now how to resolve this issue. I am hoping that you have great insights to address my plight.</div><div><br></div><div>I would really appreciate your help in this regard. Thank you!</div><div><br></div><div>Cheers,</div><div><br></div><div>Jayfe Anthony</div><div>Graduate student</div><div>University of San Carlos</div></div>
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