Electronic structure and transport properties of La_0.7Ce_0.3MnO_3

Details Electronic structure and transport properties of La_0.7Ce_0.3MnO_3 Electronic structure and transport properties of La_0.7Ce_0.3MnO_3

2005-09-14

arxiv.org/abs/cond-mat/0509351v1

Phys. Rev. B 72, 132410 (2005).

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages; Physical Review B, in press

Scientific paper

10.1103/PhysRevB.72.132410

X-ray absorption spectroscopy (XAS), optical reflectance spectroscopy, and the Hall effect measurements were used to investigate the electronic structure in La_0.7Ce_0.3MnO_3 thin films (LCeMO). The XAS results are consistent with those obtained from LDA+U calculations. In that the doping of Ce has shifted up the Fermi level and resulted in marked shrinkage of hole pockets originally existing in La_0.7Ca_0.3MnO_3 (LCaMO). The Hall measurements indicate that in LCeMO the carriers are still displaying the characteristics of holes as LDA+U calculations predict. Analyses of the optical reflectance spectra evidently disapprove the scenario that the present LCeMO might have been dominated by the La-deficient phases.

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