Strong strain gradients and phase coexistence at the metal-insulator transition in VO2 epitaxial films

The proximity of a thermodynamic triple point and the formation of transient metastable phases may result in complex phase and microstructural trajectories across the metal-insulator transition in strained VO films. A detailed analysis using in-situ synchrotron X-ray diffraction unveils subtle finge...

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Autores: Rodríguez Domínguez, Laura|||0000-0002-6669-1962, Sandiumenge Ortiz, Felip|||0000-0003-1336-1529, Frontera, Carlos|||0000-0002-0091-4756, Caicedo Roque, Jose Manuel|||0000-0002-5192-4989, Padilla-Pantoja, Jessica|||0000-0002-7769-7753, Catalan, Gustau|||0000-0003-0214-4828, Santiso, José|||0000-0003-4274-2101
Tipo de recurso: artículo
Fecha de publicación:2021
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:268421
Acceso en línea:https://ddd.uab.cat/record/268421
https://dx.doi.org/urn:doi:10.1016/j.actamat.2021.117336
Access Level:acceso abierto
Palabra clave:Metal-insulator transitions
Phase coexistence
Martensitic transitions
Local strain fields
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spelling Strong strain gradients and phase coexistence at the metal-insulator transition in VO2 epitaxial filmsRodríguez Domínguez, Laura|||0000-0002-6669-1962Sandiumenge Ortiz, Felip|||0000-0003-1336-1529Frontera, Carlos|||0000-0002-0091-4756Caicedo Roque, Jose Manuel|||0000-0002-5192-4989Padilla-Pantoja, Jessica|||0000-0002-7769-7753Catalan, Gustau|||0000-0003-0214-4828Santiso, José|||0000-0003-4274-2101Metal-insulator transitionsPhase coexistenceMartensitic transitionsLocal strain fieldsThe proximity of a thermodynamic triple point and the formation of transient metastable phases may result in complex phase and microstructural trajectories across the metal-insulator transition in strained VO films. A detailed analysis using in-situ synchrotron X-ray diffraction unveils subtle fingerprints of this complexity in the structure of epitaxial films. During phase transition the low-temperature monoclinic M1 phase is constrained along the {111} planes by the coexisting high-temperature R phase domains, which remain epitaxially clamped to the substrate. This geometrical constraint induces counteracting local stresses that result in a combined tilt and uniaxial in-plane compression of M1 domains, and a concomitant anomalous c-axis elongation. This mechanism progressively transforms the M1 phase into the transitional triclinic phase (T), and ultimately into the monoclinic M2 phase, generating strong strain and tilt gradients that remain frozen after the complete transformation of the R phase upon cooling to RT. The transformation path of VO films, the complex competition between stable and metastable VO polymorphs and its impact on the structure of the low temperature monoclinic state, provide essential insights for understanding the electronic and mechanical properties of the films at the nanoscale, as well as to control their use in functional devices. 22021-01-0120212021-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/268421https://dx.doi.org/urn:doi:10.1016/j.actamat.2021.117336reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengEuropean Commission https://doi.org/10.13039/501100000780 730872Agencia Estatal de Investigación https://doi.org/10.13039/501100011033 PID2019-108573GB-C21Ministerio de Economía, Industria y Competitividad https://doi.org/10.13039/501100010198 SEV-2017-0706Ministerio de Economía, Industria y Competitividad https://doi.org/10.13039/501100010198 MAT2016-77100-C2-1-PAgencia Estatal de Investigación https://doi.org/10.13039/501100011033 RTI2018-098537-B-C21Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 SEV-2015-0496Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2017/SGR-579open accesshttp://purl.org/coar/access_right/c_abf2Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2684212026-06-06T12:50:31Z
dc.title.none.fl_str_mv Strong strain gradients and phase coexistence at the metal-insulator transition in VO2 epitaxial films
title Strong strain gradients and phase coexistence at the metal-insulator transition in VO2 epitaxial films
spellingShingle Strong strain gradients and phase coexistence at the metal-insulator transition in VO2 epitaxial films
Rodríguez Domínguez, Laura|||0000-0002-6669-1962
Metal-insulator transitions
Phase coexistence
Martensitic transitions
Local strain fields
title_short Strong strain gradients and phase coexistence at the metal-insulator transition in VO2 epitaxial films
title_full Strong strain gradients and phase coexistence at the metal-insulator transition in VO2 epitaxial films
title_fullStr Strong strain gradients and phase coexistence at the metal-insulator transition in VO2 epitaxial films
title_full_unstemmed Strong strain gradients and phase coexistence at the metal-insulator transition in VO2 epitaxial films
title_sort Strong strain gradients and phase coexistence at the metal-insulator transition in VO2 epitaxial films
dc.creator.none.fl_str_mv Rodríguez Domínguez, Laura|||0000-0002-6669-1962
Sandiumenge Ortiz, Felip|||0000-0003-1336-1529
Frontera, Carlos|||0000-0002-0091-4756
Caicedo Roque, Jose Manuel|||0000-0002-5192-4989
Padilla-Pantoja, Jessica|||0000-0002-7769-7753
Catalan, Gustau|||0000-0003-0214-4828
Santiso, José|||0000-0003-4274-2101
author Rodríguez Domínguez, Laura|||0000-0002-6669-1962
author_facet Rodríguez Domínguez, Laura|||0000-0002-6669-1962
Sandiumenge Ortiz, Felip|||0000-0003-1336-1529
Frontera, Carlos|||0000-0002-0091-4756
Caicedo Roque, Jose Manuel|||0000-0002-5192-4989
Padilla-Pantoja, Jessica|||0000-0002-7769-7753
Catalan, Gustau|||0000-0003-0214-4828
Santiso, José|||0000-0003-4274-2101
author_role author
author2 Sandiumenge Ortiz, Felip|||0000-0003-1336-1529
Frontera, Carlos|||0000-0002-0091-4756
Caicedo Roque, Jose Manuel|||0000-0002-5192-4989
Padilla-Pantoja, Jessica|||0000-0002-7769-7753
Catalan, Gustau|||0000-0003-0214-4828
Santiso, José|||0000-0003-4274-2101
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Metal-insulator transitions
Phase coexistence
Martensitic transitions
Local strain fields
topic Metal-insulator transitions
Phase coexistence
Martensitic transitions
Local strain fields
description The proximity of a thermodynamic triple point and the formation of transient metastable phases may result in complex phase and microstructural trajectories across the metal-insulator transition in strained VO films. A detailed analysis using in-situ synchrotron X-ray diffraction unveils subtle fingerprints of this complexity in the structure of epitaxial films. During phase transition the low-temperature monoclinic M1 phase is constrained along the {111} planes by the coexisting high-temperature R phase domains, which remain epitaxially clamped to the substrate. This geometrical constraint induces counteracting local stresses that result in a combined tilt and uniaxial in-plane compression of M1 domains, and a concomitant anomalous c-axis elongation. This mechanism progressively transforms the M1 phase into the transitional triclinic phase (T), and ultimately into the monoclinic M2 phase, generating strong strain and tilt gradients that remain frozen after the complete transformation of the R phase upon cooling to RT. The transformation path of VO films, the complex competition between stable and metastable VO polymorphs and its impact on the structure of the low temperature monoclinic state, provide essential insights for understanding the electronic and mechanical properties of the films at the nanoscale, as well as to control their use in functional devices.
publishDate 2021
dc.date.none.fl_str_mv 2
2021-01-01
2021
2021-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/268421
https://dx.doi.org/urn:doi:10.1016/j.actamat.2021.117336
url https://ddd.uab.cat/record/268421
https://dx.doi.org/urn:doi:10.1016/j.actamat.2021.117336
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv European Commission https://doi.org/10.13039/501100000780 730872
Agencia Estatal de Investigación https://doi.org/10.13039/501100011033 PID2019-108573GB-C21
Ministerio de Economía, Industria y Competitividad https://doi.org/10.13039/501100010198 SEV-2017-0706
Ministerio de Economía, Industria y Competitividad https://doi.org/10.13039/501100010198 MAT2016-77100-C2-1-P
Agencia Estatal de Investigación https://doi.org/10.13039/501100011033 RTI2018-098537-B-C21
Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 SEV-2015-0496
Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2017/SGR-579
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by-nc-nd/4.0/
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
https://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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