Possible route to efficient thermoelectric applications in a driven fractal network

Possible route to efficient thermoelectric applications in a driven fractal network

Abstract An essential attribute of many fractal structures is self-similarity. A Sierpinski gasket (SPG) triangle is a promising example of a fractal lattice that exhibits localized energy eigenstates. In the present work, for the first time we establish that a mixture of both extended and localized...

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Autores principales: Kallol Mondal, Sudin Ganguly, Santanu K. Maiti
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2021
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Science
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Acceso en línea:https://doaj.org/article/50a340856af24be0b3848420b2310cab
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spelling oai:doaj.org-article:50a340856af24be0b3848420b2310cab2021-12-02T15:09:23ZPossible route to efficient thermoelectric applications in a driven fractal network10.1038/s41598-021-96592-12045-2322https://doaj.org/article/50a340856af24be0b3848420b2310cab2021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96592-1https://doaj.org/toc/2045-2322Abstract An essential attribute of many fractal structures is self-similarity. A Sierpinski gasket (SPG) triangle is a promising example of a fractal lattice that exhibits localized energy eigenstates. In the present work, for the first time we establish that a mixture of both extended and localized energy eigenstates can be generated yeilding mobility edges at multiple energies in presence of a time-periodic driving field. We obtain several compelling features by studying the transmission and energy eigenvalue spectra. As a possible application of our new findings, different thermoelectric properties are discussed, such as electrical conductance, thermopower, thermal conductance due to electrons and phonons. We show that our proposed method indeed exhibits highly favorable thermoelectric performance. The time-periodic driving field is assumed through an arbitrarily polarized light, and its effect is incorporated via Floquet-Bloch ansatz. All transport phenomena are worked out using Green’s function formalism following the Landauer–Büttiker prescription.Kallol MondalSudin GangulySantanu K. MaitiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Kallol Mondal
Sudin Ganguly
Santanu K. Maiti
Possible route to efficient thermoelectric applications in a driven fractal network
description Abstract An essential attribute of many fractal structures is self-similarity. A Sierpinski gasket (SPG) triangle is a promising example of a fractal lattice that exhibits localized energy eigenstates. In the present work, for the first time we establish that a mixture of both extended and localized energy eigenstates can be generated yeilding mobility edges at multiple energies in presence of a time-periodic driving field. We obtain several compelling features by studying the transmission and energy eigenvalue spectra. As a possible application of our new findings, different thermoelectric properties are discussed, such as electrical conductance, thermopower, thermal conductance due to electrons and phonons. We show that our proposed method indeed exhibits highly favorable thermoelectric performance. The time-periodic driving field is assumed through an arbitrarily polarized light, and its effect is incorporated via Floquet-Bloch ansatz. All transport phenomena are worked out using Green’s function formalism following the Landauer–Büttiker prescription.
format article
author Kallol Mondal
Sudin Ganguly
Santanu K. Maiti
author_facet Kallol Mondal
Sudin Ganguly
Santanu K. Maiti
author_sort Kallol Mondal
title Possible route to efficient thermoelectric applications in a driven fractal network
title_short Possible route to efficient thermoelectric applications in a driven fractal network
title_full Possible route to efficient thermoelectric applications in a driven fractal network
title_fullStr Possible route to efficient thermoelectric applications in a driven fractal network
title_full_unstemmed Possible route to efficient thermoelectric applications in a driven fractal network
title_sort possible route to efficient thermoelectric applications in a driven fractal network
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/50a340856af24be0b3848420b2310cab
work_keys_str_mv AT kallolmondal possibleroutetoefficientthermoelectricapplicationsinadrivenfractalnetwork
AT sudinganguly possibleroutetoefficientthermoelectricapplicationsinadrivenfractalnetwork
AT santanukmaiti possibleroutetoefficientthermoelectricapplicationsinadrivenfractalnetwork
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