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

Chang, W. J.; Tsai, J. Y.; Jeng, H. -T.; Lin, J. -Y.; Zhang, Kenneth Y. -J.; Liu, H. L.; Lee, J. M.; Chen, J. M.; Wu, K. H.; Uen, T. M.; Gou, Y. S.; Juang, J. Y.

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

Authors

Zhang, Kenneth Y. -J.

Description

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.
4 pages; Physical Review B, in press