Polaron framework to account for transport properties in metallic epitaxial manganite films
| Autor: | D. Busquets-Mataix, N. Homonnay, Mirko Prezioso, Patrizio Graziosi, Alessandro Gambardella, Georg Schmidt, Alberto Riminucci, Daniele Pullini, Ilaria Bergenti |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Carrier density collapse
Colossal magnetoresistance Materials science T-C 02 engineering and technology Neutron scattering Polaron 01 natural sciences Optical conductivity Condensed Matter::Materials Science CIENCIA DE LOS MATERIALES E INGENIERIA METALURGICA 0103 physical sciences Temperature-dependent resistivity LA0.7SR0.3MNO3 THIN-FILMS 010306 general physics Condensed matter physics Colossal-magnetoresistance Atmospheric temperature range Double exchange 021001 nanoscience & nanotechnology Condensed Matter Physics Manganite LA1-XSRXMNO3 Electronic Optical and Magnetic Materials Doped manganites Ferromagnetism Transition Charge carrier Condensed Matter::Strongly Correlated Electrons 0210 nano-technology Electrical-resistivity |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname Physical review. B, Condensed matter and materials physics 89 (2014). doi:10.1103/PhysRevB.89.214411 info:cnr-pdr/source/autori:Graziosi, Patrizio; Gambardella, Alessandro; Prezioso, Mirko; Riminucci, Alberto; Bergenti, Ilaria; Homonnay, Nico; Schmidt, Georg Cornelius; Pullini, Daniele; Busquets-Mataix, David/titolo:Polaron framework to account for transport properties in metallic epitaxial manganite films/doi:10.1103%2FPhysRevB.89.214411/rivista:Physical review. B, Condensed matter and materials physics/anno:2014/pagina_da:/pagina_a:/intervallo_pagine:/volume:89 |
| ISSN: | 2010-2461 |
| DOI: | 10.1103/PhysRevB.89.214411 |
| Popis: | [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. 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|