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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
; | | Date: |
5 Mar 2002 | | Journal: | Phys. Rev. B 65, 115118 (2002). | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Affiliation: | SNU), B. G. Kim, T. Y. Koo, S.-W. Cheong (RUGERS Univ.), Y. J. Wang, and X. Wei (NHMFL | | Abstract: | We investigated temperature (T)- and magnetic field-dependent optical conductivity spectra (sw) 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 (sw) 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. | | Source: | arXiv, cond-mat/0203098 | | Services: | Forum | Review | PDF | Favorites | |
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