  We report an experimental study of Cooper pair splitting in an encapsulated
graphene based multiterminal junction in the ballistic transport regime. Our
device consists of two transverse junctions, namely the
superconductor/graphene/superconductor and the normal metal/graphene/normal
metal junctions. In this case, the electronic transport through one junction
can be tuned by an applied bias along the other. We observe clear signatures of
Cooper pair splitting in the local as well as nonlocal electronic transport
measurements. Our experimental data can be very well described by using a
modified Octavio-Tinkham-Blonder-Klapwijk model and a three-terminal beam
splitter model.
