Contact effects in spin transport along double-helical molecules

We report on spin transport along double-helical molecular systems by considering various contact configurations and asymmetries between the two helical strands in the regime of completely coherent charge transport. Our results reveal that no spin polarization appears in two-terminal molecular devic...

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Detalhes bibliográficos
Autores: Ai-Min, Guo, Díaz García, Elena, Gaul, Christopher, Gutierrez, R., Domínguez-Adame Acosta, Francisco, Cuniberti, G., Sun, Qing-feng
Formato: artículo
Fecha de publicación:2014
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/34002
Acesso em linha:https://hdl.handle.net/20.500.14352/34002
Access Level:acceso abierto
Palavra-chave:538.9
Single dna-molecules
Electron transmission
Hole transfer
Conductivity
Selectivity
Conductance
Phase
Física de materiales
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oai_identifier_str oai:docta.ucm.es:20.500.14352/34002
network_acronym_str ES
network_name_str España
repository_id_str
spelling Contact effects in spin transport along double-helical moleculesAi-Min, GuoDíaz García, ElenaGaul, ChristopherGutierrez, R.Domínguez-Adame Acosta, FranciscoCuniberti, G.Sun, Qing-feng538.9Single dna-moleculesElectron transmissionHole transferConductivitySelectivityConductancePhaseFísica de materialesWe report on spin transport along double-helical molecular systems by considering various contact configurations and asymmetries between the two helical strands in the regime of completely coherent charge transport. Our results reveal that no spin polarization appears in two-terminal molecular devices when coupled to one-dimensional electrodes. The same holds in the case of finite-width electrodes if there is a bottleneck of one single site in the system electrode-molecule-electrode. Then, additional dephasing is necessary to induce spin-filtering effects. In contrast, nonzero spin polarization is found in molecular devices with multiple terminals or with two finite-width electrodes, each of them connected to more than one site of the molecule. The magnitude of spin polarization can be enhanced by increasing the asymmetry between the two strands. We point out that the spin-filtering effects could emerge in double-helical molecular devices at low temperature without dephasing by a proper choice of the electrode number and the connection between the molecule and the electrodes.American Physical SocietyUniversidad Complutense de Madrid20142014-04-2820142014-04-28journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/34002reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/340022026-06-02T12:44:21Z
dc.title.none.fl_str_mv Contact effects in spin transport along double-helical molecules
title Contact effects in spin transport along double-helical molecules
spellingShingle Contact effects in spin transport along double-helical molecules
Ai-Min, Guo
538.9
Single dna-molecules
Electron transmission
Hole transfer
Conductivity
Selectivity
Conductance
Phase
Física de materiales
title_short Contact effects in spin transport along double-helical molecules
title_full Contact effects in spin transport along double-helical molecules
title_fullStr Contact effects in spin transport along double-helical molecules
title_full_unstemmed Contact effects in spin transport along double-helical molecules
title_sort Contact effects in spin transport along double-helical molecules
dc.creator.none.fl_str_mv Ai-Min, Guo
Díaz García, Elena
Gaul, Christopher
Gutierrez, R.
Domínguez-Adame Acosta, Francisco
Cuniberti, G.
Sun, Qing-feng
author Ai-Min, Guo
author_facet Ai-Min, Guo
Díaz García, Elena
Gaul, Christopher
Gutierrez, R.
Domínguez-Adame Acosta, Francisco
Cuniberti, G.
Sun, Qing-feng
author_role author
author2 Díaz García, Elena
Gaul, Christopher
Gutierrez, R.
Domínguez-Adame Acosta, Francisco
Cuniberti, G.
Sun, Qing-feng
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 538.9
Single dna-molecules
Electron transmission
Hole transfer
Conductivity
Selectivity
Conductance
Phase
Física de materiales
topic 538.9
Single dna-molecules
Electron transmission
Hole transfer
Conductivity
Selectivity
Conductance
Phase
Física de materiales
description We report on spin transport along double-helical molecular systems by considering various contact configurations and asymmetries between the two helical strands in the regime of completely coherent charge transport. Our results reveal that no spin polarization appears in two-terminal molecular devices when coupled to one-dimensional electrodes. The same holds in the case of finite-width electrodes if there is a bottleneck of one single site in the system electrode-molecule-electrode. Then, additional dephasing is necessary to induce spin-filtering effects. In contrast, nonzero spin polarization is found in molecular devices with multiple terminals or with two finite-width electrodes, each of them connected to more than one site of the molecule. The magnitude of spin polarization can be enhanced by increasing the asymmetry between the two strands. We point out that the spin-filtering effects could emerge in double-helical molecular devices at low temperature without dephasing by a proper choice of the electrode number and the connection between the molecule and the electrodes.
publishDate 2014
dc.date.none.fl_str_mv 2014
2014-04-28
2014
2014-04-28
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/34002
url https://hdl.handle.net/20.500.14352/34002
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869403111183876096
score 15,301603

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