STRUC_CONVERGE contains the progress of the structural relaxation
STRUC_LOG a detailed log about the relaxation steps performed
ELASTO_PHONON information from the H matrix: Bulk modulus, phonon frequencies
PW_LOG a log about all the PW calls done. Use this to restart calculations
OUT._0, OUT._1 output file of the current relaxation step for processor 0, 1,..
CHECKPOINT contains all the information to continue a
structural relaxation. Also has the Hessian matrix
*.dx files for visualization with the IBM Data Explorer
*.kh files for visualization with Khoros