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<div class="moz-cite-prefix">On 15/11/2023 08:45,
<a class="moz-txt-link-abbreviated" href="mailto:ludwigboltzmann.sc10@nycu.edu.tw">ludwigboltzmann.sc10@nycu.edu.tw</a> wrote:<br>
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<blockquote type="cite"
cite="mid:556445676.2164587.1700034309830@mail.yahoo.com">
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<div dir="ltr" data-setdir="false"> Hope this will give you an
idea why such<b> symmetry reduced</b> supercell calculation is
being carried out.</div>
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<p>The idea is "symmetry reduced".</p>
<p>I.e. DFPT allows you to simulate a monochromatic perturbation of
any periodicity with a unit cell, while frozen phonon can only
simulate perturbation which have the periodicity of the cell you
are using. But to break symmetry, you need a supercell.<br>
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<p>kind regards</p>
<p>L<br>
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