Plasticity of Persistent Photoconductance of Amorphous LaAlO3/SrTiO3 Interfaces under Varying Illumination Condition

We report on transport measurements under optical stimulation of persistent photoconductance (PPC) at the interface between amorphous LaAlO3 films and SrTiO3 crystals. The spectral response in the visible region was analyzed under varying illumination conditions and exposure times down to millisecon...

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Detalhes bibliográficos
Autores: Chen, Yu, Casals, Blai, Herranz, Gervasi
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2019
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/202795
Acesso em linha:http://hdl.handle.net/10261/202795
Access Level:acceso abierto
Palavra-chave:Persistent photoconductance
Oxide interfaces
Neuromorphic engineering
Photonics
Two-dimensional electron systems
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spelling Plasticity of Persistent Photoconductance of Amorphous LaAlO3/SrTiO3 Interfaces under Varying Illumination ConditionChen, YuCasals, BlaiHerranz, GervasiPersistent photoconductanceOxide interfacesNeuromorphic engineeringPhotonicsTwo-dimensional electron systemsWe report on transport measurements under optical stimulation of persistent photoconductance (PPC) at the interface between amorphous LaAlO3 films and SrTiO3 crystals. The spectral response in the visible region was analyzed under varying illumination conditions and exposure times down to milliseconds. The PPC is plastically modulated by optical stimuli of varying strength and duration, demonstrating fine-tuned photoconductive responsivity over a diversity of cumulated timespans. Interestingly, under optimal conditions, the photoconductance is sensitive to intensity contrasts under conditions comparable to bright-sunlight environments. The prospects of exploiting photoconductance—including potential strategies to reach higher sensitivity—are discussed in the context of neuromorphic applications.This work was supported by the Spanish Ministerio de Ciencia, Innovacion y Universidades through Grants No. MAT2017- ́ 85232-R (AEI/FEDER, UE), and Severo Ochoa SEV-2015- 0496, and the Generalitat de Catalunya through Grant No. 2017 301 SGR1377. We acknowledge collaboration and discussions with Dr. Florencio Sanchez regarding thin ́ film growth. Y C. acknowledges the China Scholarship Council grant n° 201506890029. This work is part of the Ph.D. thesis of Y.C.Peer reviewedAmerican Chemical SocietyMinisterio de Ciencia, Innovación y Universidades (España)Generalitat de CatalunyaConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202020202019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/202795reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#MICIU/ICTI2017-2020/MAT2017-85232-Rinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2015-0496http://dx.doi.org/10.1021/acsaelm.9b00127Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2027952026-05-22T06:33:51Z
dc.title.none.fl_str_mv Plasticity of Persistent Photoconductance of Amorphous LaAlO3/SrTiO3 Interfaces under Varying Illumination Condition
title Plasticity of Persistent Photoconductance of Amorphous LaAlO3/SrTiO3 Interfaces under Varying Illumination Condition
spellingShingle Plasticity of Persistent Photoconductance of Amorphous LaAlO3/SrTiO3 Interfaces under Varying Illumination Condition
Chen, Yu
Persistent photoconductance
Oxide interfaces
Neuromorphic engineering
Photonics
Two-dimensional electron systems
title_short Plasticity of Persistent Photoconductance of Amorphous LaAlO3/SrTiO3 Interfaces under Varying Illumination Condition
title_full Plasticity of Persistent Photoconductance of Amorphous LaAlO3/SrTiO3 Interfaces under Varying Illumination Condition
title_fullStr Plasticity of Persistent Photoconductance of Amorphous LaAlO3/SrTiO3 Interfaces under Varying Illumination Condition
title_full_unstemmed Plasticity of Persistent Photoconductance of Amorphous LaAlO3/SrTiO3 Interfaces under Varying Illumination Condition
title_sort Plasticity of Persistent Photoconductance of Amorphous LaAlO3/SrTiO3 Interfaces under Varying Illumination Condition
dc.creator.none.fl_str_mv Chen, Yu
Casals, Blai
Herranz, Gervasi
author Chen, Yu
author_facet Chen, Yu
Casals, Blai
Herranz, Gervasi
author_role author
author2 Casals, Blai
Herranz, Gervasi
author2_role author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia, Innovación y Universidades (España)
Generalitat de Catalunya
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Persistent photoconductance
Oxide interfaces
Neuromorphic engineering
Photonics
Two-dimensional electron systems
topic Persistent photoconductance
Oxide interfaces
Neuromorphic engineering
Photonics
Two-dimensional electron systems
description We report on transport measurements under optical stimulation of persistent photoconductance (PPC) at the interface between amorphous LaAlO3 films and SrTiO3 crystals. The spectral response in the visible region was analyzed under varying illumination conditions and exposure times down to milliseconds. The PPC is plastically modulated by optical stimuli of varying strength and duration, demonstrating fine-tuned photoconductive responsivity over a diversity of cumulated timespans. Interestingly, under optimal conditions, the photoconductance is sensitive to intensity contrasts under conditions comparable to bright-sunlight environments. The prospects of exploiting photoconductance—including potential strategies to reach higher sensitivity—are discussed in the context of neuromorphic applications.
publishDate 2019
dc.date.none.fl_str_mv 2019
2020
2020
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/10261/202795
url http://hdl.handle.net/10261/202795
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
MICIU/ICTI2017-2020/MAT2017-85232-R
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2015-0496
http://dx.doi.org/10.1021/acsaelm.9b00127
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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