Kondo effect in a neutral and stable all organic radical single molecule break junction

Organic radicals are neutral, purely organic molecules exhibiting an intrinsic magnetic moment due to the presence of an unpaired electron in the molecule in its ground state. This property, added to the low spin–orbit coupling and weak hyperfine interactions, make neutral organic radicals good cand...

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Authors: Frisenda, Riccardo, Gaudenzi, Rocco, Franco, Carlos, Mas Torrent, Marta, Rovira, Concepció, Veciana, Jaume, Alcón, Isaac, Bromley, Stefan T., Burzurí, Enrique, Van der Zant, Herre S.J.
Format: article
Status:Versión aceptada para publicación
Publication Date:2015
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/116645
Online Access:http://hdl.handle.net/10261/116645
Access Level:Open access
Keyword:Single
molecule
Break
junction
Electrical
transport
Kondo
effect
Organic
radical
Magnetism
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spelling Kondo effect in a neutral and stable all organic radical single molecule break junctionFrisenda, RiccardoGaudenzi, RoccoFranco, CarlosMas Torrent, MartaRovira, ConcepcióVeciana, JaumeAlcón, IsaacBromley, Stefan T.Burzurí, EnriqueVan der Zant, Herre S.J.SinglemoleculeBreakjunctionElectricaltransportKondoeffectOrganicradicalMagnetismOrganic radicals are neutral, purely organic molecules exhibiting an intrinsic magnetic moment due to the presence of an unpaired electron in the molecule in its ground state. This property, added to the low spin–orbit coupling and weak hyperfine interactions, make neutral organic radicals good candidates for molecular spintronics insofar as the radical character is stable in solid state electronic devices. Here we show that the paramagnetism of the polychlorotriphenylmethyl radical molecule in the form of a Kondo anomaly is preserved in two- and three-terminal solid-state devices, regardless of mechanical and electrostatic changes. Indeed, our results demonstrate that the Kondo anomaly is robust under electrodes displacement and changes of the electrostatic environment, pointing to a localized orbital in the radical as the source of magnetism. Strong support to this picture is provided by density functional calculations and measurements of the corresponding nonradical species. These results pave the way toward the use of all-organic neutral radical molecules in spintronics devices and open the door to further investigations into Kondo physics.This work was supported by the EU FP7 program through project 618082 ACMOL and ERC grants advanced (Mols@Mols) and StG 2012-306826 e-GAMES. It was also supported by the Dutch Organization for Fundamental research (FOM), OCW, NWO(VENI), the Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN) DGI (Spain) with projects BE-WELL CTQ2013-40480-R and MAT2012-30924, and Generalitat de Catalunya 14 (2014-SGR-17),(2014SGR97) and XRQTC. C.F. acknowledges CSIC for his PhD bursary and he is enrolled in the Materials Science PhD program of UABPeer reviewedAmerican Chemical SocietyConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201520152015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/116645reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#618082http://pubs.acs.org/doi/abs/10.1021/acs.nanolett.5b00155Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1166452026-05-22T06:33:51Z
dc.title.none.fl_str_mv Kondo effect in a neutral and stable all organic radical single molecule break junction
title Kondo effect in a neutral and stable all organic radical single molecule break junction
spellingShingle Kondo effect in a neutral and stable all organic radical single molecule break junction
Frisenda, Riccardo
Single
molecule
Break
junction
Electrical
transport
Kondo
effect
Organic
radical
Magnetism
title_short Kondo effect in a neutral and stable all organic radical single molecule break junction
title_full Kondo effect in a neutral and stable all organic radical single molecule break junction
title_fullStr Kondo effect in a neutral and stable all organic radical single molecule break junction
title_full_unstemmed Kondo effect in a neutral and stable all organic radical single molecule break junction
title_sort Kondo effect in a neutral and stable all organic radical single molecule break junction
dc.creator.none.fl_str_mv Frisenda, Riccardo
Gaudenzi, Rocco
Franco, Carlos
Mas Torrent, Marta
Rovira, Concepció
Veciana, Jaume
Alcón, Isaac
Bromley, Stefan T.
Burzurí, Enrique
Van der Zant, Herre S.J.
author Frisenda, Riccardo
author_facet Frisenda, Riccardo
Gaudenzi, Rocco
Franco, Carlos
Mas Torrent, Marta
Rovira, Concepció
Veciana, Jaume
Alcón, Isaac
Bromley, Stefan T.
Burzurí, Enrique
Van der Zant, Herre S.J.
author_role author
author2 Gaudenzi, Rocco
Franco, Carlos
Mas Torrent, Marta
Rovira, Concepció
Veciana, Jaume
Alcón, Isaac
Bromley, Stefan T.
Burzurí, Enrique
Van der Zant, Herre S.J.
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Single
molecule
Break
junction
Electrical
transport
Kondo
effect
Organic
radical
Magnetism
topic Single
molecule
Break
junction
Electrical
transport
Kondo
effect
Organic
radical
Magnetism
description Organic radicals are neutral, purely organic molecules exhibiting an intrinsic magnetic moment due to the presence of an unpaired electron in the molecule in its ground state. This property, added to the low spin–orbit coupling and weak hyperfine interactions, make neutral organic radicals good candidates for molecular spintronics insofar as the radical character is stable in solid state electronic devices. Here we show that the paramagnetism of the polychlorotriphenylmethyl radical molecule in the form of a Kondo anomaly is preserved in two- and three-terminal solid-state devices, regardless of mechanical and electrostatic changes. Indeed, our results demonstrate that the Kondo anomaly is robust under electrodes displacement and changes of the electrostatic environment, pointing to a localized orbital in the radical as the source of magnetism. Strong support to this picture is provided by density functional calculations and measurements of the corresponding nonradical species. These results pave the way toward the use of all-organic neutral radical molecules in spintronics devices and open the door to further investigations into Kondo physics.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015
2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/116645
url http://hdl.handle.net/10261/116645
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
618082
http://pubs.acs.org/doi/abs/10.1021/acs.nanolett.5b00155
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812429

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