[Wien] regarding unit of wave vectror

[Dr. K. C. Bhamu]

Dear Users/Prof. Peter

Please confirm the unit of wave vectror (horizontel axis in band
structure): Is it in k [2*pi/bohr]   or in k [pi/m]?

I am consedring it a 2*pi/bohr.

My purpose it to calculate effective mass. So,  considering it in
2*pi/bohr, I am converting into pi/m  (m is meter) and then calculating
coefficdent of the double differentiation.


Kind regards
Bhamu
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