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    <div class="moz-cite-prefix">Dear Rakesh,</div>
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    <div class="moz-cite-prefix">the ENVIRON libraray can do that:<br>
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    <div class="moz-cite-prefix"><a class="moz-txt-link-freetext" href="http://www.quantum-environ.org">http://www.quantum-environ.org</a><br>
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    <div class="moz-cite-prefix">Note that interesting and important
      effects could come from the interface states of the perovskites,
      though, and so a continuum model might not be enough - it also
      depends if you care about the interface with a liquid, or with a
      solid.</div>
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    <div class="moz-cite-prefix">  nicola<br>
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    <div class="moz-cite-prefix">On 26/12/2020 16:12, Rakesh Pradhan
      wrote:<br>
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cite="mid:CAO+WMU-kn0brxxePnKtUs+3TZuM36Cw84T8PkoV_JU6h7RySLg@mail.gmail.com">
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      <div dir="ltr">Dear All,
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        <div>I am currently studying perovskite interfaces. I want to
          replace the vacuum of my simulation cell with materials of
          different permittivity and calculate their density of states.
          I'm aware that this can be achieved by creating interfaces of
          different materials with perovskites, however, my
          perovskite system is very large and I want to
          avoid additional atoms.</div>
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        <div>Is there any code which can replace the vacuum with a
          virtual material of different permittivity?</div>
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              -- <br>
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                  <div dir="ltr"><span
                      style="font-weight:700;background-color:transparent"><font
                        color="#38761d">THANKS & REGARDS</font></span>
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style="font-stretch:normal;font-size:13.33px;line-height:19.99px;background-color:transparent;overflow:visible"><b><br>
                      </b></div>
                    <div
style="font-stretch:normal;font-size:13.33px;line-height:19.99px;background-color:transparent;overflow:visible"><b>Rakesh
                        Rosan Pradhan</b></div>
                    <div
style="font-stretch:normal;font-size:13.33px;line-height:19.99px;overflow:visible"><font
                        color="#0b5394"><b>PhD Scholar</b></font></div>
                    <div
style="font-stretch:normal;font-size:13.33px;line-height:19.99px;overflow:visible"><font
                        color="#0b5394"><b>Applied Physics</b></font></div>
                    <div
style="font-stretch:normal;font-size:13.33px;line-height:19.99px;overflow:visible"><font
                        color="#0b5394"><b>King Abdullah University of
                          Science & Technology (KAUST)</b></font></div>
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