<div dir="auto">Hi M. Brehm,<div dir="auto">Thanks for replying.</div><div dir="auto">I took a look at TRAVIS but i found out that we can obtain the spectrum of organic molecule. </div><div dir="auto">And we can’t compute spectra of the inorganic molecule, yet.</div><div dir="auto">Please , Do you have any new informations about this?</div><div dir="auto">Sincerly!</div><div dir="auto"><br></div></div><br><div class="gmail_quote"><div dir="ltr">Le sam. 9 févr. 2019 à 15:48, M. Brehm <<a href="mailto:brehmin...@gmail.com">brehmin...@gmail.com</a>> a écrit :<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi,<br><br>you can have a look at the TRAVIS program package. It is open source free software, and can compute IR/Raman/VCD/ROA spectra from AIMD trajectories:<br><br> <a href="http://www.travis-analyzer.de" target="_blank" rel="noreferrer">http://www.travis-analyzer.de</a><br><br>There is also a step-by-step tutorial how to setup such a computation:<br><br> <a href="https://brehm-research.de/spectroscopy" target="_blank" rel="noreferrer">https://brehm-research.de/spectroscopy</a><br><br>Please note that a standard trajectory (with only the atom positions) is not enough to compute spectra. You additionally require the dipole moments (and in case of Raman and ROA, also the polarizabilities) in each step. The approach from the tutorial solves this by evaluating the total electron density in each simulation step.<br><br>Best regards,<br>Martin<br></div>
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