.eigval — Exciton Energies

This file contains the exciton eigenvalues (binding energies) computed from solving the Bethe-Salpeter Equation (BSE).

It is generated when running Xatu with an exciton input file and requesting eigenvalues explicitly (via -e or --energy).

Format

A plain text list of exciton energies in electron volts (eV):

Ncells
BSE dimension
Number of states
E_1
E_2
E_3
E_4
.
.
.

Each line corresponds to a different exciton state, in ascending order of energy.