Question on Virtual Crystal Approx.(VCA)

  • Level: Graduate 
  • Thread starter leoant
  • Start date
  • Tags Tags
    Crystal Virtual
1 reply · 4K views · last reply
leoant
Messages
35
Reaction score
0
Dear all,
I am now intended to do some first-principle calculations on disordered system, where VCA is an effective method. However, as to practical implementation using different methods, say Plane-Wave Pseudopotential, FPLMTO, FPLAPW, it's a litter hard to get a clear picture about how to set some parameters, the main reason, I think, is that if one consider two different kind of atoms, say A and B, it's hard to get the electron configuration when two atoms form disordered structure A(1-x)Bx. Is anyone here has done some similar work on this area, and would you please give any advice on how to deal with the problem?
Thanks.
Regards.
 
What I did was linearly interpolating lattice constants and atomic pseudopotentials with introducing another empirical parameter to fit to experimental data.