  Charge density wave, or CDW, is usually associated with Fermi surfaces
nesting. We here report a new CDW mechanism discovered in a 2H-structured
transition metal dichalcogenide, where the two essential ingredients of CDW are
realized in very anomalous ways due to the strong-coupling nature of the
electronic structure. Namely, the CDW gap is only partially open, and charge
density wavevector match is fulfilled through participation of states of the
large Fermi patch, while the straight FS sections have secondary or negligible
contributions.
