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Current Induced Heat Generation in Ferromagnet-Quantum Dot-Ferromagnet System

We study the heat generation in ferromagnet-quantum dot-ferromagnet system by the non-equilibrium Green’s functions method. Heat generation under the influence of ferromagnet leads is very different compared with a system with normal metal leads. The significant effects in heat generation are caused...

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Detalles Bibliográficos
Autores principales: Zhao, Lili, Chen, Qiao, Zhang, Yamin, Zhao, Lina
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5455657/
https://www.ncbi.nlm.nih.gov/pubmed/28793411
http://dx.doi.org/10.3390/ma8073854
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author Zhao, Lili
Chen, Qiao
Zhang, Yamin
Zhao, Lina
author_facet Zhao, Lili
Chen, Qiao
Zhang, Yamin
Zhao, Lina
author_sort Zhao, Lili
collection PubMed
description We study the heat generation in ferromagnet-quantum dot-ferromagnet system by the non-equilibrium Green’s functions method. Heat generation under the influence of ferromagnet leads is very different compared with a system with normal metal leads. The significant effects in heat generation are caused by the polarization angle θ associated with the orientation of polarized magnetic moment of electron in the ferromagnetic terminals. From the study of heat generation versus source drain bias (Q-eV) curves, we find that the heat generation decreases as θ increases from 0 to 0.7π. The heat generation versus gate voltage (Q-eV(g)) curves also display interesting behavior with increasing polarization angle θ. Meanwhile, heat generation is influenced by the relative angle θ of magnetic moment in the ferromagnetic leads. These results will provide theories to this quantum dot system as a new material of spintronics.
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spelling pubmed-54556572017-07-28 Current Induced Heat Generation in Ferromagnet-Quantum Dot-Ferromagnet System Zhao, Lili Chen, Qiao Zhang, Yamin Zhao, Lina Materials (Basel) Article We study the heat generation in ferromagnet-quantum dot-ferromagnet system by the non-equilibrium Green’s functions method. Heat generation under the influence of ferromagnet leads is very different compared with a system with normal metal leads. The significant effects in heat generation are caused by the polarization angle θ associated with the orientation of polarized magnetic moment of electron in the ferromagnetic terminals. From the study of heat generation versus source drain bias (Q-eV) curves, we find that the heat generation decreases as θ increases from 0 to 0.7π. The heat generation versus gate voltage (Q-eV(g)) curves also display interesting behavior with increasing polarization angle θ. Meanwhile, heat generation is influenced by the relative angle θ of magnetic moment in the ferromagnetic leads. These results will provide theories to this quantum dot system as a new material of spintronics. MDPI 2015-06-25 /pmc/articles/PMC5455657/ /pubmed/28793411 http://dx.doi.org/10.3390/ma8073854 Text en © 2015 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhao, Lili
Chen, Qiao
Zhang, Yamin
Zhao, Lina
Current Induced Heat Generation in Ferromagnet-Quantum Dot-Ferromagnet System
title Current Induced Heat Generation in Ferromagnet-Quantum Dot-Ferromagnet System
title_full Current Induced Heat Generation in Ferromagnet-Quantum Dot-Ferromagnet System
title_fullStr Current Induced Heat Generation in Ferromagnet-Quantum Dot-Ferromagnet System
title_full_unstemmed Current Induced Heat Generation in Ferromagnet-Quantum Dot-Ferromagnet System
title_short Current Induced Heat Generation in Ferromagnet-Quantum Dot-Ferromagnet System
title_sort current induced heat generation in ferromagnet-quantum dot-ferromagnet system
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5455657/
https://www.ncbi.nlm.nih.gov/pubmed/28793411
http://dx.doi.org/10.3390/ma8073854
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AT chenqiao currentinducedheatgenerationinferromagnetquantumdotferromagnetsystem
AT zhangyamin currentinducedheatgenerationinferromagnetquantumdotferromagnetsystem
AT zhaolina currentinducedheatgenerationinferromagnetquantumdotferromagnetsystem