  Twisted van der Waals materials have been shown to host a variety of tunable
electronic structures. Here we put forward twisted trilayer graphene (TTG) as a
platform to emulate heavy fermion physics. We demonstrate that TTG hosts
extended and localized modes with an electronic structure that can be
controlled by interlayer bias. In the presence of interactions, the existence
of localized modes leads to the development of local moments, which are Kondo
coupled to coexisting extended states. By electrically controlling the
effective exchange between local moments, the system can be driven from a
magnetic into a heavy fermion regime, passing through a quantum critical point.
Our results put forward twisted graphene multilayers as a platform for the
realization of strongly correlated heavy fermion physics in a purely
carbon-based platform.
