Graziosi, P.; Gambardella, A.; Prezioso, M.; Riminucci, A.; Bergenti, I.; Homonnay, N.; Schmidt, G.... (2014). Polaron framework to account for transport properties in metallic epitaxial manganite films. Physical Review B. 89(21):1-7. https://doi.org/10.1103/PhysRevB.89.214411
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/62885
Título:
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Polaron framework to account for transport properties in metallic epitaxial manganite films
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Autor:
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Graziosi, Patrizio
Gambardella, A.
Prezioso, M.
Riminucci, A.
Bergenti, I.
Homonnay, N.
Schmidt, G.
Pullini, D.
Busquets Mataix, David Jerónimo
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Entidad UPV:
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Universitat Politècnica de València. Instituto de Tecnología de Materiales - Institut de Tecnologia de Materials
Universitat Politècnica de València. Departamento de Ingeniería Mecánica y de Materiales - Departament d'Enginyeria Mecànica i de Materials
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Fecha difusión:
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Resumen:
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[EN] We propose a model for the consistent interpretation of the transport behavior of manganese perovskites in both the metallic and insulating regimes. The concept of polarons as charge carriers in the metallic ferromagnetic ...[+]
[EN] We propose a model for the consistent interpretation of the transport behavior of manganese perovskites in both the metallic and insulating regimes. The concept of polarons as charge carriers in the metallic ferromagnetic phase of manganites also solves the conflict between transport models, which usually neglects polaron effects in the metallic phase, and, on the other hand, optical conductivity, angle-resolved spectroscopy, and neutron scattering measurements, which identify polarons in the metallic phase of manganites down to 6 K. Transport characterizations of epitaxial La0.7Sr0.3MnO3 thin films in the thickness range of 5-40 nm and temperature interval of 25-410 K have been accurately collected. We show that taking into account polaron effects allows us to achieve an excellent fit of the transport curves in the whole temperature range. The current carriers density collapse picture accurately accounts for the properties variation across the metal-insulator transitions. The electron-phonon coupling parameter gamma estimations are in a good agreement with theoretical predictions. The results promote a clear and straightforward quantitative description of the manganite films involved in charge transport device applications and promises to describe other oxide systems involving a metal-insulator transition.
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Palabras clave:
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Carrier density collapse
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Temperature-dependent resistivity
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LA0.7SR0.3MNO3 THIN-FILMS
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Colossal-magnetoresistance
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Electrical-resistivity
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Doped manganites
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Double exchange
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T-C
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LA1-XSRXMNO3
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Transition
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Derechos de uso:
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Reserva de todos los derechos
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Fuente:
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Physical Review B. (issn:
1098-0121
) (eissn:
1550-235X
)
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DOI:
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10.1103/PhysRevB.89.214411
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Editorial:
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American Physical Society
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Versión del editor:
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http://dx.doi.org/10.1103/PhysRevB.89.214411
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Código del Proyecto:
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info:eu-repo/grantAgreement/EC/FP7/246102/EU/Interfacing Oxides/
info:eu-repo/grantAgreement/EC/FP7/263104/EU/Next Generation Hybrid Interfaces for Spintronic Applications/
info:eu-repo/grantAgreement/EC/FP7/246073/EU/GRaphenE for NAnoscaleD Applications/
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Agradecimientos:
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The authors P.G., A.G., M.P., A.R., and I.B. thank F. Bona for technical help and A. Dediu and V. Kabanov for fruitful discussions. Financial support from the FP7 Projects No. NMP3-LA-2010-246102 (Interfacing oxides, IFOX), ...[+]
The authors P.G., A.G., M.P., A.R., and I.B. thank F. Bona for technical help and A. Dediu and V. Kabanov for fruitful discussions. Financial support from the FP7 Projects No. NMP3-LA-2010-246102 (Interfacing oxides, IFOX), No. NMP-2010-SMALL-4-263104 (Next generation hybrid interfaces for spintronic applications, HINTS), No. NMP3-SL-2010-246073 (Graphene for nanoscaled applications, GRENADA), and the Italian government FIRB (Molecular nanomagnets on metallic and magnetic surfaces for applications in molecular spintronics) Project No. RBAP117RWN is acknowledged.
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Tipo:
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Artículo
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