  The evolution of the charge carrier concentrations and mobilities are
examined across the charge-density-wave (CDW) transition in TiSe2. Combined
quantum oscillation and magnetotransport measurements show that a small
electron pocket dominates the electronic properties at low temperatures whilst
an electron and hole pocket contribute at room temperature. At the CDW
transition, an abrupt Fermi surface reconstruction and a minimum in the
electron and hole mobilities are extracted from two-band and Kohler analysis of
magnetotransport measurements. The minimum in the mobilities is associated with
the overseen role of scattering from the softening CDW mode. With the carrier
concentrations and dynamics dominated by the CDW and the associated bosonic
mode, our results highlight TiSe2 as a prototypical system to study the Fermi
surface reconstruction at a density-wave transition.
