Real and imaginary part of transition matrix elements in k-space #543
Description
Dear Devloper,
I am calculating optical conductivity (sum of Berry curvature) of a 2D materials using Kubo formula. The Berry curvature of a system is given by the imaginary part of ~~ <nk|v_x|mk> <mk|v_y|nk> transition matrix elements. The expectation value of each velocity operator is a complex quantity (real and imarigary part). Is it possible to find the expectation value of each transition matrix elements in A+iB (I need A and B separetly) format from the ouput of the wannier90 code?
In addition, how can I define the x-polarization or x-polarization optical conductivity in the input file of wanier90?
Thank you in advance!