Advertisement

The European Physical Journal B

, Volume 79, Issue 4, pp 435–441 | Cite as

Optical investigation of LaMnO3 thin films: a study of the 2-eV band

  • A. NucaraEmail author
  • F. Miletto Granozio
  • M. Radovic
  • F. M. Vitucci
  • P. Maselli
  • R. Fittipaldi
  • A. Vecchione
  • P. Calvani
Article

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 Néel temperature T N \(\simeq\) 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 t 2g and e g 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.

Keywords

Manganite Optical Conductivity Charge Dynamic Orbital Order Core Spin 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    For a review see E. Dagotto, T. Hotta, A. Moreo, Phys. Rep. 344, 1 (2001) ADSCrossRefGoogle Scholar
  2. 2.
    P.W. Anderson, H. Hasegawa, Phys. Rev. 100, 675 (1955) ADSCrossRefGoogle Scholar
  3. 3.
    A.J. Millis, Nature 392, 147 (1998) ADSCrossRefGoogle Scholar
  4. 4.
    J.C. Loudon, S. Cox, A.J. Williams, J.P. Attfield, P.B. Littlewood, P.A. Midgley, N.D. Mathur, Phys. Rev. Lett. 94, 097202 (2005) ADSCrossRefGoogle Scholar
  5. 5.
    S. Cox, J. Singleton, R.D. McDonald, A. Migliori, P.B. Littlewood, Nature Mater. 7, 25 (2008) ADSCrossRefGoogle Scholar
  6. 6.
    A. Nucara, P. Maselli, P. Calvani, R. Sopracase, M. Ortolani, G. Gruener, M. Cestelli Guidi, U. Schade, J. Garcia, Phys. Rev. Lett. 101, 066407 (2008) ADSCrossRefGoogle Scholar
  7. 7.
    Y. Murakami, J.P. Hill, D. Gibbs, M. Blume, I. Koyama, M. Tanaka, H. Kawata, T. Arima, Y. Tokura, K. Hirota, Y. Endoh, Phys. Rev. Lett. 81, 582 (1998) ADSCrossRefGoogle Scholar
  8. 8.
    T. Arima, Y. Tokura, J.B. Torrance, Phys. Rev. B 48, 17006 (1993) ADSCrossRefGoogle Scholar
  9. 9.
    K.H. Ahn, A.J. Millis, Phys. Rev. B 61, 13545 (2000) ADSCrossRefGoogle Scholar
  10. 10.
    J.S. Lee, M.W. Kim, T.W. Noh, New J. Phys. 7, 147 (2005) ADSCrossRefGoogle Scholar
  11. 11.
    N.N. Kovaleva, A.M. Oles, A.M. Balbashov, A. Maljuk, D.N. Argyriou, G. Khaliullin, B. Keimer, Phys. Rev. B 81, 235130 (2010) ADSCrossRefGoogle Scholar
  12. 12.
    P.B. Allen, V. Perebeinos, Phys. Rev. Lett. 83, 4828 (1999) ADSCrossRefGoogle Scholar
  13. 13.
    A.S. Moskvin, Phys. Rev. B 79, 115102 (2009) ADSCrossRefGoogle Scholar
  14. 14.
    For a review, see P. Calvani, Riv. Nuovo Cim. 24, 1 (2001) ADSGoogle Scholar
  15. 15.
    S. Amoruso, C. Aruta, R. Bruzzese, D. Maccariello, L. Maritato, F. Miletto Granozio, P. Orgiani, U. Scotti di Uccio, X. Wang, J. Appl. Phys. 108, 043302 (2010) ADSCrossRefGoogle Scholar
  16. 16.
    A. Sambri, S. Amoruso, X. Wang, M. Radovic, F. Miletto Granozio, R. Bruzzese, Appl. Phys. Lett. 91, 151501 (2007) ADSCrossRefGoogle Scholar
  17. 17.
    W.S. Choi, Z. Marton, S.Y. Jang, S.J. Moon, B.C. Jeon, J.H. Shin, S.S. A Seo, T.W. Noh, K. Myung-Whun, H.N. Lee, Y.S. Lee, J. Phys. D: Appl. Phys. 42, 165401 (2009) ADSCrossRefGoogle Scholar
  18. 18.
    F. Wooten, Optics properties of Solids (New York Academic Press, 1972) Google Scholar
  19. 19.
    K. Murakami, T. Yamauchi, A. Nakamura, Y. Morimoto, H. Tanaka, T. Kawai, Phys. Rev. B 73, 180403 (2006) ADSCrossRefGoogle Scholar
  20. 20.
    M. Dressel, G. Gruner, Electrodynamics of Solids (Cambridge Press, 2002) Google Scholar
  21. 21.
    P. Calvani, M. Capizzi, S. Lupi, P. Maselli, E. Agostinelli, Physica C 180, 116 (1991) ADSCrossRefGoogle Scholar
  22. 22.
    M.W. Kim, P. Murugavel, S. Parashar, J.S. Lee, T.W. Kim, New J. Phys. 6, 156 (2004) ADSCrossRefGoogle Scholar
  23. 23.
    A. Paolone, P. Roy, A. Pimenov, A. Loidl, O.K. Mel’nikov, A.Ya. Shapiro, Phys. Rev. B 61, 11255 (2000) ADSCrossRefGoogle Scholar
  24. 24.
    A.S. Moskvin, Phys. Rev. B 65, 205113 (2002) ADSCrossRefGoogle Scholar
  25. 25.
    A. Nucara, P. Calvani, F. Crispoldi, D. Sali, S. Lupi, C. Martin, A. Maignan, Phys. Rev. B 73, 054425 (2006) ADSCrossRefGoogle Scholar

Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • A. Nucara
    • 1
    Email author
  • F. Miletto Granozio
    • 2
  • M. Radovic
    • 2
  • F. M. Vitucci
    • 1
  • P. Maselli
    • 1
  • R. Fittipaldi
    • 3
  • A. Vecchione
    • 3
  • P. Calvani
    • 1
  1. 1.CNR-SPIN and Dipartimento di FisicaUniversità di Roma La SapienzaRomaItaly
  2. 2.CNR-SPIN and Dipartimento di Scienze FisicheUniversitá degli Studi Federico II Complesso Universitario di Monte Sant’Angelo via CinthiaNapoliItaly
  3. 3.CNR-SPIN and Dipartimento di Fisica E.R. CaianielloUniversità di SalernoFiscianoItaly

Personalised recommendations