title: Enhancing the thermoelectric figure of merit in engineered graphene nanoribbons.
abstract: We demonstrate that thermoelectric properties of graphene nanoribbons can be dramatically improved by introducing nanopores. In monolayer graphene, this increases the electronic thermoelectric figure of merit ZT e from 0.01 to 0.5. The largest values of ZT e are found when a nanopore is introduced into bilayer graphene, such that the current flows from one layer to the other via the inner surface of the pore, for which values as high as ZT e = 2.45 are obtained. All thermoelectric properties can be further enhanced by tuning the Fermi energy of the leads.
authors.affiliation: Quantum Technology Centre, Department of Physics, Lancaster University, LA1 4YB Lancaster, UK.
authors.forename: Hatef
authors.initials: H
authors.lastname: Sadeghi
authors.affiliation: Quantum Technology Centre, Department of Physics, Lancaster University, LA1 4YB Lancaster, UK.
authors.forename: Sara
authors.initials: S
authors.lastname: Sangtarash
authors.affiliation: Quantum Technology Centre, Department of Physics, Lancaster University, LA1 4YB Lancaster, UK.
authors.forename: Colin J
authors.initials: CJ
authors.lastname: Lambert
keywords: graphene nanoribbons; quantum transport; thermal conductance; thermoelectric figure of merit; thermopower