  Novel perspectives of controlling molecular systems have recently arisen from
the possibility of generating attosecond pulses in the ultraviolet regime and
tailoring electron dynamics in its natural time scale. The cornerstone
mechanism is the so-called charge migration, he production of a coherent charge
transfer with subfemtosecond oscillations across a molecule. Typically, charge
migration is induced by the ionization of valence molecular orbitals. However,
recent technological developments allow the generation of attosecond pulses in
the x-ray regime. In this case, the absorption of photons creates core-hole
states. In light elements, core-hole states mainly decay by Auger processes
that, driven by electron correlations, involve valence orbitals. We
theoretically demonstrate in a fluoroacetylene molecule a double-hole charge
migration triggered by attosecond core-electron photoionization, followed by
Auger electron relaxations. This opens a new route for inducing with x rays
charge transfer processes in the subfemtosecond time scale.
