Optical Evidence of Multiphase Coexistence in Single Crystalline (La,Pr,Ca)MnO3

H. J. Lee; K. H. Kim; M. W. Kim; T. W. Noh; B. G. Kim; T. Y. Koo; S. -W. Cheong; Y. J. Wang; X. Wei

doi:10.1103/PhysRevB.65.115118

Optical Evidence of Multiphase Coexistence in Single Crystalline (La,Pr,Ca)MnO3

Strongly Correlated Electrons 2009-11-07 v1

Authors: H. J. Lee , K. H. Kim , M. W. Kim , T. W. Noh , B. G. Kim , T. Y. Koo , S. -W. Cheong , Y. J. Wang , X. Wei

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Abstract

We investigated temperature (T)- and magnetic field-dependent optical conductivity spectra (\s\w) of a La_5/8-yPr_yCa_3/8MnO_3 (y~0.35) single crystal, showing intriguing phase coexistence at low T. At T_C < T < T_CO, a dominant charge-ordered phase produces a large optical gap energy of ~0.4 eV. At T < T_C, at least two absorption bands newly emerge below 0.4 eV. Analyses of (\s\w) indicate that the new bands should be attributed to a ferromagnetic metallic and a charge-disordered phase that coexist with the charge-ordered phase. This optical study clearly shows that La_5/8-yPrCa_3/8MnO_3 (y~0.35) is composed of multiphases that might have different lattice strains.

Keywords

multiphase coexistence optical conductivity La_{5/8}PrCa_{3/8}MnO3 charge ordering ferromagnetic metallic phase

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@article{arxiv.cond-mat/0203098,
  title  = {Optical Evidence of Multiphase Coexistence in Single Crystalline (La,Pr,Ca)MnO3},
  author = {H. J. Lee and K. H. Kim and M. W. Kim and T. W. Noh and B. G. Kim and T. Y. Koo and S. -W. Cheong and Y. J. Wang and X. Wei},
  journal= {arXiv preprint arXiv:cond-mat/0203098},
  year   = {2009}
}

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A single file with 9 figures embedded, to appear in Phys. Rev. B

Optical Evidence of Multiphase Coexistence in Single Crystalline (La,Pr,Ca)MnO3

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