dispersion materials in MPB

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Dear Dr. Steven and users,

I am dealing with a polymer whose dielectric permittivity has about 30
lorentz oscillators, making it highly dispersive. Hence, I am unable to
calculate the bandgaps directly using MPB.

While an  old post dating to 2006,
http://www.mail-archive.com/mpb-discuss%40ab-initio.mit.edu/msg00040.html,
suggests a way of dealing with this issue, I am unable to proceed.

(1) Please let me know if there is a way to solve for the bandgap of
dispersive materials in the new versions.
(2) If someone in group has worked on this issue before, kindly reply.


Thank you,

Sincerely,

Chan

--
Chandraprakash

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<div dir=3D"ltr"><div>Dear Dr. Steven and users,<br><br></div><div>I am dea=
ling with a polymer whose dielectric permittivity has about 30 lorentz osci=
llators, making it highly dispersive. Hence, I am unable to calculate the b=
andgaps directly using MPB. <br><br>While an=C2=A0 old post dating to 2006,=
=C2=A0 <a href=3D"http://www.mail-archive.com/mpb-discuss%40ab-initio.mit.e=
du/msg00040.html">http://www.mail-archive.com/mpb-discuss%40ab-initio.mit.e=
du/msg00040.html</a>, suggests a way of dealing with this issue, I am unabl=
e to proceed.<br><br></div><div>(1) Please let me know if=C2=A0there is a w=
ay to solve for the bandgap of dispersive materials in the new versions.<br=
></div><div>(2) If someone in group has worked on this issue before, kindly=
 reply.<br><br><br></div><div>Thank you,<br><br></div><div>Sincerely,<br><b=
r></div><div>Chan<br></div><br clear=3D"all"><div><div><div><div class=3D"g=
mail_signature">--<br>Chandraprakash <br><br></div></div>
</div></div></div>

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