[Wien] why we need to divide plasma frequency by root(2)?

[Dr. K. C. Bhamu]

Thank you Gavin for a quick reply.

I will follow all of your advice and will report if I face any difficulty.

Bhamu




On Sun, Oct 22, 2017 at 4:12 AM, Gavin Abo <gsabo at crimson.ua.edu> wrote:

> I could be wrong, but I think you just need to take the sqrt(2) of each
> plasma frequency:
>
> 2.074/sqrt(2) 2.074/sqrt(2) 1.264/sqrt(2)
>
> then put them in case.inkram (not case.injoint).
> You should be able to use multiple plasma frequencies in case.inkram but
> don't forget to add a Gamma for drude value for each of the plasma
> frequencies [ https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.
> at/msg14495.html ].
>
> On 10/21/2017 4:29 PM, Dr. K. C. Bhamu wrote:
>
>
>> ---------------------case.injoint
>> xx
>> xx
>> 1                                              >> correction
>> 2.0740      2.0740      1.2640
>> xx
>> -----------------------------------
>>
>> were xx means no change in lines of case.inkram.
>>
>>
>>
>> At page numer  164 under section "8.11 KRAM (Kramers-Kronig
>> transformation) in UG"
>>
>>
>> *"For a metal, the Plasma-frequencies (intraband transitions) for up and
>> dn should be added, but then divided by√2, before using x kram." *
>>
>> Does it mean that we need to add all three components and then divide by
>> root(2) and put a single number [(2.074+2.074+1.264)/root(2)=3.88]
>> instead of all three in case.injoint?
>>
>>
>> kind regards
>>
>> Bhamu
>>
>
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