Enhanced thermoelectric performance of twisted bilayer graphene nanoribbons junction

Abstract

We investigate the electron transport and thermoelectric property of twisted bilayer graphene nanoribbon junction (TBGNRJ) in $0^o$, $21.8^o$, $38.2^o$ and $60^o$ rotation angles by first principles calculation with Landauer-Buttiker and Boltzmann theories. It is found that TBGNRJs exhibit negative differential resistance (NDR) in $21.8^o$ and $38.2^o$ rotation angles under $\pm$ 0.2 V bias voltage. More importantly, three peak ZT values of 2.0, 2.7 and 6.1 can be achieved in the $21.8^o$ rotation angle at 300K. The outstanding ZT values of TBGNRJs are interpreted as the combination of the reduced thermal conductivity and enhanced electrical conductivity at optimized angles.

arXiv comment13 pages, 8 figures

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Cited by in corpus (4)

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• Bilayer graphene nanoribbons junction with aligned holes exhibiting high ZT values
• Giant thermopower and power factor in magic angle twisted bilayer graphene at low temperature
• Single-layer Ga2O3/graphene heterogeneous structure with optical switching effect