Tuning the thermoelectric response of silicene nanoribbons with vacancies
In this work, we present a thorough study of the thermoelectric properties of silicene nanoribbons in the presence of a random distribution of atomic vacancies. By using a linear approach within the Landauer formalism, we calculate phonon and electron thermal conductances, the electric conductance,...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/6233 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/6233 |
| Access Level: | acceso abierto |
| Palabra clave: | 538.9 Lattice thermal-conductivity Landauer formula Figure merit Enhancement Performance Transport Nanowires Systems Fano Thermoelectricity Silicene Nanoribbons Thermal transport Física de materiales Física del estado sólido 2211 Física del Estado Sólido |
| Sumario: | In this work, we present a thorough study of the thermoelectric properties of silicene nanoribbons in the presence of a random distribution of atomic vacancies. By using a linear approach within the Landauer formalism, we calculate phonon and electron thermal conductances, the electric conductance, the Seebeck coefficient and the figure of merit of the nanoribbons. We found a sizable reduction of the phonon thermal conductance as a function of the vacancy concentration over a wide range of temperature. At the same time, the electric properties are not severely deteriorated, leading to an overall remarkable thermoelectric efficiency. We conclude that the incorporation of vacancies paves the way for designing better and more efficient nanoscale thermoelectric devices. |
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