Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/263703
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Strong strain gradients and phase coexistence at the metal-insulator transition in VO2 epitaxial films |
Autor: | Rodríguez, Laura CSIC ORCID; Sandiumenge, Felip CSIC ORCID; Frontera, Carlos CSIC ORCID; Caicedo, José Manuel CSIC ORCID; Padilla-Pantoja, Jessica CSIC ORCID; Catalán, Gustau CSIC ORCID; Santiso, José CSIC ORCID | Palabras clave: | Local strain fields Martensitic transitions Metal-insulator transitions Phase coexistence |
Fecha de publicación: | 1-nov-2021 | Editor: | Elsevier | Citación: | Acta Materialia 220: 117336 (2021) | Resumen: | 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 VO2 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}R 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 cR-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 VO2 films, the complex competition between stable and metastable VO2 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. | Versión del editor: | http://dx.doi.org/10.1016/j.actamat.2021.117336 | URI: | http://hdl.handle.net/10261/263703 | DOI: | 10.1016/j.actamat.2021.117336 | ISSN: | 1359-6454 |
Aparece en las colecciones: | (ICMAB) Artículos (CIN2) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Rodriguez_ActaMater_2021_editorial.pdf | Artículo principal | 2,66 MB | Adobe PDF | Visualizar/Abrir |
Rodriguez_ActaMater_2021_suppl_editorial.pdf | Información complementaria | 1,96 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
11
checked on 16-abr-2024
WEB OF SCIENCETM
Citations
9
checked on 28-feb-2024
Page view(s)
54
checked on 23-abr-2024
Download(s)
108
checked on 23-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
Este item está licenciado bajo una Licencia Creative Commons