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<p>Dear Mr. Rehman,</p>
<p><br>
</p>
<p>If you are unfamiliar with how Z2 invariants can be calculated
using the hybrid Wannier function approach, I would suggest you
read the following references:</p>
<p>- <a
href="https://journals.aps.org/prb/abstract/10.1103/PhysRevB.83.235401">https://journals.aps.org/prb/abstract/10.1103/PhysRevB.83.235401</a>
arxiv version: <a href="https://arxiv.org/abs/1102.5600">https://arxiv.org/abs/1102.5600</a></p>
<p>- <a
href="https://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.075146">https://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.075146</a>
arxiv version: <a href="https://arxiv.org/abs/1610.08983">https://arxiv.org/abs/1610.08983</a></p>
<p><br>
</p>
<p>If you need technical help with running Z2Pack with VASP, you can
find guidance in the tutorial <a
href="http://z2pack.ethz.ch/doc/2.1/tutorial/index.html">http://z2pack.ethz.ch/doc/2.1/tutorial/index.html</a>
and examples <a
href="http://z2pack.ethz.ch/doc/2.1/examples/vasp.html">http://z2pack.ethz.ch/doc/2.1/examples/vasp.html</a>
sections of the Z2Pack documentation.</p>
<p><br>
</p>
<p>I would be happy to answer specific questions that you might have
in reading these documents.</p>
<p><br>
</p>
<p>Best regards,</p>
<p>Dominik Gresch<br>
</p>
<br>
<div class="moz-cite-prefix">On 27.12.2017 15:53, Majeed Ur Rehman
wrote:<br>
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<blockquote type="cite"
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<p style="margin-top:0;margin-bottom:0"><span
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EmojiFont; font-size: 12pt;">Respected Sir/Madam</span><br>
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<p
style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont;
font-size:16px">
I am Mr.Majeed Ur Rehman from Pakistan. I am
Master student with very less background in VASP.
Currently, i am learning vasp tools. These days i
am interested to learn how one can calculate a
Berry curvature and Z2 topological index using
vasp, wannier90.
<span
style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont;
font-size:16px">
Let me mention that wannier90 and Z2 pack are
already interfaced with the VASP on our cluster.
But the problem is to how can I use it to
calculate Berry curvature and Z2 topological
index. For this, I need some guideline from an
expert like you, because no expert is available
here with me to guide.</span> </p>
<p
style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont;
font-size:16px">
<span
style="font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple
Color Emoji","Segoe UI
Emoji",NotoColorEmoji,"Segoe UI
Symbol","Android
Emoji",EmojiSymbols">Your help would be
highly appreciated. I know you would be too much
busy sir but your help would be like an oxygen
for me to survive at this initial and difficult
stage of my learning.</span></p>
<p
style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont;
font-size:16px">
<span
style="font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple
Color Emoji","Segoe UI
Emoji",NotoColorEmoji,"Segoe UI
Symbol","Android
Emoji",EmojiSymbols">Thank You and looking
forward for your nice response.</span></p>
<div><span
style="font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple
Color Emoji","Segoe UI
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<div style="font-style:normal;
background-color:transparent"><font size="3"
face="Calibri">Best Regards</font></div>
<div style="font-style:normal;
background-color:transparent"><font size="3"
face="Calibri"><b>Majeed-Ur-Rehman</b></font></div>
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