BSEFATBAND
The structure of the BSEFATBAND file in a line and collumn structure:
- st line: Number of e-h pairs in the BSE basis and value for NBSEEIG.
- nd line: the BSE eigenvalue
- Following lines: BSE eigenvector, columns 1-3 k-point coordinates, column 4 hole eigenvalue, column 5 electron eigenvalue, column 6 absolute value of coupling coefficient (radius of circles), column 7 hole orbitalnumber, column 8 electron orbitalnumber, column 9 real part of coupling coefficient, column 10 imaginary part of coupling coefficient.