[Wien] Plasma Freuency Not Obtained

[Yasir Ali]

Ok Thnks. Now i think i got it


 

Regards: 
Yasir Ali



________________________________
 From: Peter Blaha <pblaha at theochem.tuwien.ac.at>
To: A Mailing list for WIEN2k users <wien at zeus.theochem.tuwien.ac.at> 
Sent: Tuesday, July 23, 2013 10:26 AM
Subject: Re: [Wien] Plasma Freuency Not Obtained
 

This Plasma frequency in option 6 is for metals and intraband transitions (Drude model).

What you mean is the plasma frequency in semiconductors.

Plot the eloss function and you will see your peak. This Plasma frequency is related
to a zero in epsilon1.  (See a recent PRB about VEELS on my homepage (2013).

Am 23.07.2013 05:31, schrieb Yasir Ali:
> Hi
> Thanks Peter Blaha for reply. I have semi conductor and EELOSS have peaks in its graph.
>
>
> Regards:
> Yasir Ali
>
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> *From:* Peter Blaha <pblaha at theochem.tuwien.ac.at>
> *To:* A Mailing list for WIEN2k users <wien at zeus.theochem.tuwien.ac.at>
> *Sent:* Monday, July 22, 2013 8:05 PM
> *Subject:* Re: [Wien] Plasma Freuency Not Obtained
>
> You have an insulator ?
>
> On 07/22/2013 10:34 AM, Yasir Ali wrote:
>  > Hi wien2k users
>  >
>  > I am trying to calculate plasma frequency. i use switch 6/7 in
>  > case.injoint and the ran x joint. but in case.outputjoint plasma
>  > frequency as
>  >    Plasma frequencies:
>  >
>  >        w_p_xx      w_p_zz [eV]
>  >
>  >        0.0000      0.0000
>  >
>  > What is possible reason for not obtaining plasma frequency?
>  >
>  > Regards:
>  > Yasir Ali
>  >
>  >
>  >
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> --
>
>                                        P.Blaha
> --------------------------------------------------------------------------
> Peter BLAHA, Inst.f. Materials Chemistry, TU Vienna, A-1060 Vienna
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-- 
-----------------------------------------
Peter Blaha
Inst. Materials Chemistry, TU Vienna
Getreidemarkt 9, A-1060 Vienna, Austria
Tel: +43-1-5880115671
Fax: +43-1-5880115698
email: pblaha at theochem.tuwien.ac.at
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