spectra = sw_xray(spectra,Name,Value)


spectra = sw_xray(spectra,Name,Value) calculates x-ray scattering intensity for non-resonant inelastic x-ray scattering on phonons.

Input Arguments

Input structure that contains the displacement-displacement correlation function.

Name-Value Pair Arguments

If true, the magnetic form factor is included in the spin-spin correlation function calculation. The form factor coefficients are stored in obj.unit_cell.ff(1,:,atomIndex). Default value is false.
Function that calculates the magnetic form factor for given value. value. Default value is @sw_mff, that uses a tabulated coefficients for the form factor calculation. For anisotropic form factors a user defined function can be written that has the following header:
F = formfactfun(atomLabel,Q)

where the parameters are:

  • F row vector containing the form factor for every input value
  • atomLabel string, label of the selected magnetic atom
  • Q matrix with dimensions of , where each column contains a vector in units.
Defines whether to provide text output. The default value is determined by the fid preference stored in swpref. The possible values are:
  • 0 No text output is generated.
  • 1 Text output in the MATLAB Command Window.
  • fid File ID provided by the fopen command, the output is written into the opened file stream.

Output Arguments

Structure that is same as the input with the following additional fields:
  • param Input parameters.
  • Sperp x-ray scattering cross section, stored in a matrix with dimensions of .

See Also

spinw | spinw.spinwave | sw_neutron