http://www.cnr.it/ontology/cnr/individuo/prodotto/ID58418
Optical investigation of LaMnO(3) thin films: a study of the 2-eV band (Articolo in rivista)
- Type
- Label
- Optical investigation of LaMnO(3) thin films: a study of the 2-eV band (Articolo in rivista) (literal)
- Anno
- 2011-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1140/epjb/e2011-10945-0 (literal)
- Alternative label
Nucara, A ; Granozio, FM; Radovic, M; Vitucci, FM; Maselli, P; Fittipaldi, R; Vecchione, A; Calvani, P (2011)
Optical investigation of LaMnO(3) thin films: a study of the 2-eV band
in The European physical journal. B, Condensed matter physics (Print)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Nucara, A ; Granozio, FM; Radovic, M; Vitucci, FM; Maselli, P; Fittipaldi, R; Vecchione, A; Calvani, P (literal)
- Pagina inizio
- Pagina fine
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- Rivista
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- CNR-SPIN and Dipartimento di Fisica, Universit`a di Roma La Sapienza, Piazzale A. Moro 2, 00185 Roma, Italy
CNR-SPIN and Dipartimento di Scienze Fisiche, Universit´a degli Studi Federico II Complesso Universitario
di Monte Sant'Angelo via Cinthia 80126, Napoli, Italy
CNR-SPIN and Dipartimento di Fisica E.R. Caianiello, Universit`a di Salerno, via Ponte don Melillo, 84084 Fisciano, Italy (literal)
- Titolo
- Optical investigation of LaMnO(3) thin films: a study of the 2-eV band (literal)
- Abstract
- We measure the transmittance of LaMnO3 (LMO) thin films in the spectral range from 10 000
to 38 000 cm-1 as a function of temperature. The optical conductivity obtained from the transmittance
data is decomposed into five Drude-Lorentz contributions: three of them show evident changes below the
N´eel temperature TN ? 140 K. We discuss the band assignment in the framework of the tight-binding
and of the orbitally degenerate Hubbard models. Our results ascribe the overall low-frequency spectrum
of LMO to charge-transfer mechanisms involving the t2g and eg electrons of the Mn ions, without invoking
the presence of excitonic contributions. This finding definitely promotes a Mott-Hubbard scenario for LMO
and provides an estimate of the Hamiltonian parameters. (literal)
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