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

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

2006-10-16

arxiv.org/abs/cond-mat/0610441v1

Phys. Rev. B 74, 165119 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

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

Scientific paper

10.1103/PhysRevB.74.165119

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.

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