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Strain dependence of the thermoelectric performance of porous armchair silicene nanoribbons

Published online by Cambridge University Press:  11 November 2019

Sukhdeep Kaur ,
Deep Kamal Kaur Randhawa  and
Sukhleen Bindra Narang Open the ORCID record for Sukhleen Bindra Narang [Opens in a new window]
Sukhdeep Kaur
Affiliation:
Department of Electronics Technology, Guru Nanak Dev University, Amritsar, Punjab 143005, India
Deep Kamal Kaur Randhawa
Affiliation:
Department of Electronics and Communication Engineering, Guru Nanak Dev University, RC Jalandhar, Ladhewali, Punjab 144007, India
Sukhleen Bindra Narang*
Affiliation:
Department of Electronics Technology, Guru Nanak Dev University, Amritsar, Punjab 143005, India
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

In this article, the strain-dependent thermoelectric performance of circular porous armchair silicene nanoribbons (ASiNRs) under uniaxial tension and compression is computed by means of a semiempirical approach in combination with nonequilibrium Green’s function. Our findings clearly demonstrate that the thermoelectric performance can be effectively tuned by the optimum choice of the nature and magnitude of the strain depending on the pore size. For smaller pore sizes, higher tensile strains can be preferred whereas for nanostructures with larger pores, the compression is a suitable option. Further analysis concludes that the tensile deformation fails to attain any improvement in the thermoelectric figure of merit ZT at any choice of temperature, whereas the performance under compressive deformation goes on improving with the increase in the applied temperature. In addition, changing the pore shape to a triangular one is found to significantly enhance the thermoelectric performance.

Keywords

porenanoribbonstrainthermoelectricthermal conductance, figure of merit
Type
Article
Information
Journal of Materials Research , Volume 34 , Issue 23 , 16 December 2019 , pp. 3946 - 3953
Copyright
Copyright © Materials Research Society 2019 

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