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Enhanced thermoelectric performance of twisted bilayer graphene nanoribbons junction / Shuo Deng; Xiang Cai; Yan Zhang; Lijie Li

Carbon, Volume: 145, Pages: 622 - 628

Swansea University Author: Lijie, Li

Abstract

We investigate the electron transport and thermoelectric property of twisted bilayer graphene nanoribbon junction (TBGNRJ) in 0°, 21.8°, 38.2° and 60° rotation angles by first principles calculation with Landauer-Buttiker and Boltzmann theories. It is found that TBGNRJs exhibit a strong reduction of...

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Published in: Carbon
ISSN: 0008-6223
Published: 2019
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa48574
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Abstract: We investigate the electron transport and thermoelectric property of twisted bilayer graphene nanoribbon junction (TBGNRJ) in 0°, 21.8°, 38.2° and 60° rotation angles by first principles calculation with Landauer-Buttiker and Boltzmann theories. It is found that TBGNRJs exhibit a strong reduction of thermal conductance compared with the single graphene nanoribbon (GNR) and negative differential resistance (NDR) in 21.8° and 38.2° rotation angles under 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° rotation angle at 300 K. The outstanding ZT values of TBGNRJs are interpreted as the combination of the reduced thermal conductivity and enhanced electrical conductivity at optimized angles.
College: College of Engineering
Start Page: 622
End Page: 628