Spin Seebeck effect of correlated magnetic molecules

Abstract In this paper we investigate the spin-resolved thermoelectric properties of strongly correlated molecular junctions in the linear response regime. The magnetic molecule is modeled by a single orbital level to which the molecular core spin is attached by an exchange interaction. Using the nu...

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Autores principales:	Anand Manaparambil, Ireneusz Weymann
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1c3de97cba534bc1bdb4eb8969cb4337
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spelling	oai:doaj.org-article:1c3de97cba534bc1bdb4eb8969cb43372021-12-02T17:39:18ZSpin Seebeck effect of correlated magnetic molecules10.1038/s41598-021-88373-72045-2322https://doaj.org/article/1c3de97cba534bc1bdb4eb8969cb43372021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88373-7https://doaj.org/toc/2045-2322Abstract In this paper we investigate the spin-resolved thermoelectric properties of strongly correlated molecular junctions in the linear response regime. The magnetic molecule is modeled by a single orbital level to which the molecular core spin is attached by an exchange interaction. Using the numerical renormalization group method we analyze the behavior of the (spin) Seebeck effect, heat conductance and figure of merit for different model parameters of the molecule. We show that the thermopower strongly depends on the strength and type of the exchange interaction as well as the molecule’s magnetic anisotropy. When the molecule is coupled to ferromagnetic leads, the thermoelectric properties reveal an interplay between the spin-resolved tunneling processes and intrinsic magnetic properties of the molecule. Moreover, in the case of finite spin accumulation in the leads, the system exhibits the spin Seebeck effect. We demonstrate that a considerable spin Seebeck effect can develop when the molecule exhibits an easy-plane magnetic anisotropy, while the sign of the spin thermopower depends on the type and magnitude of the molecule’s exchange interaction.Anand ManaparambilIreneusz WeymannNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Anand Manaparambil Ireneusz Weymann Spin Seebeck effect of correlated magnetic molecules
description	Abstract In this paper we investigate the spin-resolved thermoelectric properties of strongly correlated molecular junctions in the linear response regime. The magnetic molecule is modeled by a single orbital level to which the molecular core spin is attached by an exchange interaction. Using the numerical renormalization group method we analyze the behavior of the (spin) Seebeck effect, heat conductance and figure of merit for different model parameters of the molecule. We show that the thermopower strongly depends on the strength and type of the exchange interaction as well as the molecule’s magnetic anisotropy. When the molecule is coupled to ferromagnetic leads, the thermoelectric properties reveal an interplay between the spin-resolved tunneling processes and intrinsic magnetic properties of the molecule. Moreover, in the case of finite spin accumulation in the leads, the system exhibits the spin Seebeck effect. We demonstrate that a considerable spin Seebeck effect can develop when the molecule exhibits an easy-plane magnetic anisotropy, while the sign of the spin thermopower depends on the type and magnitude of the molecule’s exchange interaction.
format	article
author	Anand Manaparambil Ireneusz Weymann
author_facet	Anand Manaparambil Ireneusz Weymann
author_sort	Anand Manaparambil
title	Spin Seebeck effect of correlated magnetic molecules
title_short	Spin Seebeck effect of correlated magnetic molecules
title_full	Spin Seebeck effect of correlated magnetic molecules
title_fullStr	Spin Seebeck effect of correlated magnetic molecules
title_full_unstemmed	Spin Seebeck effect of correlated magnetic molecules
title_sort	spin seebeck effect of correlated magnetic molecules
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1c3de97cba534bc1bdb4eb8969cb4337
work_keys_str_mv	AT anandmanaparambil spinseebeckeffectofcorrelatedmagneticmolecules AT ireneuszweymann spinseebeckeffectofcorrelatedmagneticmolecules
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Spin Seebeck effect of correlated magnetic molecules

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