[Wien] Is there any relationship between DOS(E_F) and conductivity?

[Vladimir Timochevski]

Hello S. Pourmasoud,

To calculate conductivity (in a "bandstructure" approach), you also need 
to know how many electronic states have non-zero momentum in your 
transport direction (in simple words ...). In other words, you need to 
calculate the Fermi surface projection on the plane, normal to your 
transport direction. Therefore, as Gerhard noticed, conductance also 
depends on details of electronic structure - Fermi surface topology. You 
can check this ref on how to use this approach to calculate transport 
properties:
Phys. Rev. B 57, 8907 (1998).

Vladimir.

===========================================
Dr. Vladimir Timoshevskii (Timochevski)
Department of Physics, McGill University,
3600 rue University, Montreal, QC
Canada H3A 2T8
Tel: +1 (514) 396-8935
Fax: +1 (514) 398-8434
===========================================




On 06/28/12 05:04, Fecher, Gerhard wrote:
> Fast answer:
> compare Fe and Cu and you have it.
>
> The conductivity depends not only on the DOS at Ef but also on the setails of the bandstructure.
> There is no way to compare whether Sodium, Copper, or Gold are more metallic or not.
>
> Ciao
> Gerhard
>
> ====================================
> Dr. Gerhard H. Fecher
> Institut of Inorganic and Analytical Chemistry
> Johannes Gutenberg - University
> 55099 Mainz
> ________________________________________
> Von: wien-bounces at zeus.theochem.tuwien.ac.at [wien-bounces at zeus.theochem.tuwien.ac.at]" im Auftrag von"saeid pourmasoud [sa_pourmasoud2007 at yahoo.com]
> Gesendet: Donnerstag, 28. Juni 2012 06:45
> An: wien at zeus.theochem.tuwien.ac.at
> Betreff: [Wien] Is there any relationship between DOS(E_F) and conductivity?
>
> Dear All,
> We are working on two different metallic compounds. I have calculated
> total DOS at Fermi level, DOS(E_F), for these two compounds. Our
> result shows that the DOS(E_F) of the first compound is larger than
> the  DOS(E_F) of the second compound. Can I conclude from this
> observation that the first compound is more metallic than the second
> compound? Can we compare conductivity of these two compounds using
> their total DOS values at Fermi levels? Can you cite a reference in
> this respect?
> Best regards,
> S. Pourmasoud
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