Thermoelectric current in a graphene Cooper pair splitter

TL;DR

This paper demonstrates the experimental observation and theoretical validation of a non-local Seebeck effect in a graphene-based Cooper pair splitter, highlighting its potential for generating entangled electrons through thermoelectricity.

Contribution

It provides the first experimental evidence of non-local thermoelectric effects in a graphene CPS device and offers a theoretical model validating these findings.

Findings

Experimental demonstration of non-local Seebeck effect in graphene CPS

Theoretical validation of thermoelectric phenomena in the device

Potential application in entangled electron generation

Abstract

Thermoelectric effect generating electricity from thermal gradient and vice versa appears in numerous generic applications. Recently, an original prospect of thermoelectricity arising from the nonlocal Cooper pair splitting (CPS) and the elastic co-tunneling (EC) in hybrid normal metal-superconductor-normal metal (NSN) structures was foreseen. Here we demonstrate experimentally the existence of non-local Seebeck effect in a graphene-based CPS device comprising two quantum dots connected to an aluminum superconductor and theoretically validate the observations. This non-local Seebeck effect offers an efficient tool for producing entangled electrons.