Abstract
The O-1s x-ray near-edge-absorption spectra of La1.5-xCaxBa1.5Cu3Oy have been measured by using synchrotron radiation. Their spectral features of the pre-edge spectra indicate that there is an electronic structure change similar to the effect of Pr in Y1-xPrxBa2Cu3O7-δ; the holes on the CuO2 planes increase with the doping concentration of Ca ions; not all the excess oxygen (for y≧7.0) in the basal plane supply holes; and there is a sign of increasing, rather than decreasing, the holes around the apical oxygen O(4) with the increase of the replacement of Ba by La on the Ba sites, an indication of a redistribution of holes.
| Original language | English |
|---|---|
| Pages (from-to) | 4357-4362 |
| Number of pages | 6 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 60 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1999 Jan 1 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Song, Y. F., Chang, C. N., Kao, H. C. I., Hsieh, C. H., Liu, H. F., Lin, H. D., & Huang, W. W. (1999). O-1s x-ray near-edge absorption spectroscopy studies of La1.5-xCaxBa1.5Cu3Oy and La1.5CaxBa1.5-xCu3Oy. Physical Review B - Condensed Matter and Materials Physics, 60(6), 4357-4362. https://doi.org/10.1103/PhysRevB.60.4357