  The electron temperature dependent electron density of states, Fermi-Dirac
distribution, and electron-phonon spectral function are computed as
prerequisites before achieving effective electron-phonon coupling factor. The
obtained coupling factor is implemented into a molecular dynamics (MD) and
two-temperature model (TTM) coupled simulation of femtosecond laser heating. By
monitoring temperature evolutions of electron and lattice subsystems, the
result utilizing coupling factor from ab initio calculation, shows a faster
decrease of electron temperature and increase of lattice temperature than those
using coupling factor from phenomenological treatment. The approach of
calculating coupling factor and its implementation into MD-TTM simulation is
applicable to other metals.
