Effective electron mass of tungsten

[yeyintkoko]

Hello!
Please tell me what Effective electron mass of tungsten and Effective hole mass of tungsten?

 

[ZapperZ]

Hello!
Please tell me what Effective electron mass of tungsten and Effective hole mass of tungsten?

This is vague and undefined.

First of all, do you know how "effective mass" is defined? You never indicated that you do.

Secondly, the effective mass of anything depends on the curvature of the band structure (which you would have known if you know how effective mass is defined). It means that it can have more than one value, depending on where on the band structure you are looking at.

Finally, do you know the band structure of tungsten?

Zz.

 

[yeyintkoko]

This is vague and undefined.

First of all, do you know how "effective mass" is defined? You never indicated that you do.

Secondly, the effective mass of anything depends on the curvature of the band structure (which you would have known if you know how effective mass is defined). It means that it can have more than one value, depending on where on the band structure you are looking at.

Finally, do you know the band structure of tungsten?

Zz.

Thanks for reply.
I want to calculate volume concentration(cm^-3) of W-AlN at 300K. (If W filled 10 % volume, how many concentration in sample W₁₀ - AlN₉₀.)
Now i know effective mass of electron and hole AlN (m_e = 0.4 m_oand m_h =3.53 m_o) and energy band gap of AlN (6.01 eV). But don't known properties of tungsten. Can i calculate volume concentration using this formula? n = (N_c·N_v)^1/2exp[-E_g/(2 · k_b · T)]

 

[Gordianus]

I found this reference; it may give some information:

Energy band structure and thermo-mechanical properties of tungsten and tungsten carbides as studied by the LMTO-ASA method
V.P.ZhukovV.A.Gubanov

Solid State Communications
Volume 56, Issue 1, October 1985, Pages 51-55