1. Enhanced Seebeck effect in gated O-shaped Kekulé graphene junctions.
- Author
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Zhang, Peipei, Wang, Chao, Zhai, Lixue, and Song, Juntao
- Subjects
SEEBECK effect ,SEEBECK coefficient ,THERMOELECTRIC apparatus & appliances ,THERMOELECTRIC effects ,GRAPHENE - Abstract
The Seebeck effect in graphene with uniform Kekulé lattice distortion has been studied using the tight-binding model combined with the nonequilibrium Green's function method. The numerical results of this work show that the Seebeck coefficient of the O-shaped Kekulé graphene can be enhanced by modulating the gate voltage. At room temperature (T ≈ 300 K), the Seebeck coefficient for the armchair nanoribbon is S c ≈ 1370 μV/K and for the zigzag nanoribbon is S c ≈ 1260 μV/K. At low temperature (T ≈ 128 K), the Seebeck coefficient for the armchair nanoribbon is S c ≈ 2500 μV/K. In addition, the nano-structuration of the O-shaped Kekulé graphene layer induces an anisotropic behavior in the Seebeck effect. Our work provides an idea for the fabrication of efficient and controllable thermoelectric effect devices. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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