Thermoelectric Current in a Graphene Cooper Pair Splitter*

Thermoelectric effect converting the temperature difference into the electric voltage and vice versa has a wealth of applications. Recent theoretical studies found that thermoelectricity may emerge as a result of the nonlocal Cooper pair splitting and elastic co-tunneling processes. We propose a coherent transport description of the nonlocal Seebeck effect and demonstrate its agreement with the experimental observations in a graphene-based Cooper pair splitting device. Our observation lays the ground for a new method of generating entangled electrons.