Details

Autor(en) / Beteiligte

• Chen, Y
• Jayasekera, T
• Calzolari, A
• Kim, K W
• Buongiorno Nardelli, M

Titel

Thermoelectric properties of graphene nanoribbons, junctions and superlattices

Ist Teil von

• Journal of physics. Condensed matter, 2010-09, Vol.22 (37), p.372202-372202

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2010

Quelle

MEDLINE

Beschreibungen/Notizen

• Using model interaction Hamiltonians for both electrons and phonons and Green's function formalism for ballistic transport, we have studied the thermal conductance and the thermoelectric properties of graphene nanoribbons (GNR), GNR junctions and periodic superlattices. Among our findings we have established the role that interfaces play in determining the thermoelectric response of GNR systems both across single junctions and in periodic superlattices. In general, increasing the number of interfaces in a single GNR system increases the peak ZT values that are thus maximized in a periodic superlattice. Moreover, we proved that the thermoelectric behavior is largely controlled by the width of the narrower component of the junction. Finally, we have demonstrated that chevron-type GNRs recently synthesized should display superior thermoelectric properties.