Comparative study of the unoccupied electronic structure of La1-xCaxMnO3 and LaMnO3+δ using O 1s X-ray absorption spectroscopy

被引：15

作者：

Abbate, M

Zampieri, G

Prado, F

Caneiro, A

de Castro, ARB

机构：

[1] Univ Fed Parana, Dept Fis, BR-81531900 Curitiba, Parana, Brazil

[2] Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[3] CNPq, Lab Nacl Luz Sincrotron, BR-13083970 Campinas, SP, Brazil

来源：

SOLID STATE COMMUNICATIONS | 1999年 / 111卷 / 08期

基金：

巴西圣保罗研究基金会;

关键词：

insulators; electronic states; synchrotron radiation;

D O I：

10.1016/S0038-1098(99)00221-5

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We studied the unoccupied electronic structure of La1-xCaxMnO3 and LaMnO3+delta using O 1s X-ray absorption spectroscopy. The spectra reflect, through the oxygen-metal hybridization, the different metal bands. The first structure just above the threshold corresponds to the unoccupied Mn 3d bands. The experimental results show that the unoccupied Mn 3d bands of LaMnO3+delta are similar to those of La1-xCaxMnO3. This is surprising, considering the fact that the mechanisms of hole doping are completely different. The results indicate that the potential disorder does not play a dominant role in these compounds. This helps us to explain the surprising similarities in the physical properties of these compounds. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：437 / 441

页数：5

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