Electronic structure of Pr${}_{0.67}$Ca${}_{0.33}$MnO${}_3$ near the Fermi level studied by ultraviolet photoelectron and x-ray absorption spectroscopy

Abstract

We have investigated the temperature-dependent changes in the near-$E$${}_F$ occupied and unoccupied states of Pr${}_{0.67}$Ca${}_{0.33}$MnO${}_3$ which shows the presence of ferromagnetic and antiferromagnetic phases. The temperature-dependent changes in the charge and orbital degrees of freedom and associated changes in the Mn 3$d$ - O 2$p$ hybridization result in varied O 2$p$ contributions to the valence band. A quantitative estimate of the charge transfer energy ($E$${}_{CT}$) shows a larger value compared to the earlier reported estimates. The charge localization causing the large $E$${}_{CT}$ is discussed in terms of different models including the electronic phase separation.

19 pages, 7 figures, To be published in Phy. Rev. B

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Cited by in corpus (4)

• Near Fermi level Electronic Structure of Pr${}_{1-x}$Sr${}_x$MnO${}_3$: Photoemission Study
• Temperature-dependent photoemission spectral weight transfer and chemical potential shift in Pr${}_{1-x}$Ca${}_x$MnO${}_3$ : Implications for charge density modulation
• Pseudogap behavior of phase-separated Sm${}_{1-x}$Ca${}_x$MnO${}_3$ : A comparative photoemission study with double exchange
• Pseudogap behavior in Pr${}_{0.5}$Sr${}_{0.5}$MnO${}_3$: A photoemission study