  We predict twisted double bilayer graphene to be a versatile platform for the
realization of fractional Chern insulators readily targeted by tuning the gate
potential and the twist angle. Remarkably, these topologically ordered states
of matter, including spin singlet Halperin states and spin polarized states in
Chern number $\mathcal C=1$ and $\mathcal{C}= 2$ bands, occur at high
temperatures and without the need for an external magnetic field.

Mesoscale and Nanoscale Physics;Materials Science;Strongly Correlated Electrons