<div dir="ltr">I have a single Mn2+ ion in the isolated system with vacuum between periodic images. Spin-unpolarized calculations run without any errors so I wonder whether spin-unpolarized calculations produce any useful results.<div><br></div><div>Best, Iryna Zaporozhets</div></div><div class="gmail_extra"><br><div class="gmail_quote">2017-08-09 23:39 GMT-07:00 stefano de gironcoli <span dir="ltr"><<a href="mailto:degironc@sissa.it" target="_blank">degironc@sissa.it</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div class="m_4512805707151426714moz-cite-prefix">depends on your system, is it magnetic
?<br>
metallic aluminum or copper have spin compensated densities and
you can use nspin=1.<br>
nickel or iron are magnetic and nspin=2 is needed.<br>
stefano<div><div class="h5"><br>
<br>
On 10/08/2017 08:29, Iryna Zaporozhets wrote:<br>
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<blockquote type="cite"><div><div class="h5">
<div dir="ltr">Dear PW community,
<div><br>
</div>
<div>I am working with an open-shell system which requires a lot
of computational efforts. Is it possible to use other options
than spin-polarized calculations (nspin = 2) to reduce
computational cost, for example, restricted open-shell DFT?
Is there any physical meaning to the results obtained with
spin-unpolarized (nspin = 1) calculations in case of the
open-shell system?</div>
<div><br>
</div>
<div>Thank you,</div>
<div>Iryna Zaporozhets,</div>
<div>Master student in Chemistry</div>
<div>Kharkiv National University, Ukraine</div>
</div>
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