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Tuning the thermoelectric response of silicene nanoribbons with vacancies

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Núñez, C. and Saiz Bretín, M. and Orellana, P. A. and Rosales, L. and Domínguez-Adame Acosta, Francisco (2020) Tuning the thermoelectric response of silicene nanoribbons with vacancies. Journal of physics: condensed matter, 32 (27). ISSN 0953-8984

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Official URL: http://dx.doi.org/10.1088/1361-648X/ab7e56


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https://iopscience.iop.org/Publisher


Abstract

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.


Item Type:Article
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©2020 IOP Publishing Ltd.
P A O and L R thank the financial support by FONDECYT (Grant No. 1180914) and DGIIP-USM grant. Work in Madrid was supported by MINECO (Grant MAT2016-75955). C N thanks a scholarship from CONICYT-Chile and the DGIIP for financial support by PIIC grant.

Uncontrolled Keywords:Lattice thermal-conductivity; Landauer formula; Figure; merit; Enhancement; Performance; Transport; Nanowires; Systems; Fano; Thermoelectricity; Silicene Nanoribbons; Thermal transport
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:60432
Deposited On:11 May 2020 11:18
Last Modified:11 May 2020 11:18

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