The effect of electron–phonon interaction on the thermoelectric properties of defect zigzag nanoribbons

• Published in: Solid state communications 2016-12, Vol.248, p.83-87
• Main Authors: Kolesnikov, D.V., Lobanov, D.A., Osipov, V.A.
• Format: Article
• Language: English
• Subjects: A. Graphene nanoribbons; C. Vacancies; D. Electron–phonon; D. Thermoelectric properties
• ISSN: 0038-1098; 1879-2766
• DOI: 10.1016/j.ssc.2016.09.013

Thermoelectric properties of graphene nanoribbons with periodic edge vacancies and antidot lattice are investigated. The electron–phonon interaction is taken into account in the framework of the Hubbard–Holstein model with the use of the Lang–Firsov unitary transformation scheme. The electron transmission function, the thermopower and the thermoelectric figure of merit are calculated. We have found that the electron–phonon interaction causes a decrease in the peak values of the thermoelectric figure of merit and the shift of the peak positions closer to the center of the bandgap. The effects are more pronounced for the secondary peaks that appear in the structures with periodic antidot. •The influence of electron-phonon interaction on the thermoelectric properties of defect nanoribbons is investigated.•The electron–phonon interaction is described by the Hubbard–Holstein Hamiltonian.•The thermoelectric figure of merit decreases and shifts due to electron–phonon interaction.•The shift and the decrease are more pronounced for the case of periodic antidot.