摘要
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.
原文 | 英語 |
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頁(從 - 到) | 4357-4362 |
頁數 | 6 |
期刊 | Physical Review B - Condensed Matter and Materials Physics |
卷 | 60 |
發行號 | 6 |
DOIs | |
出版狀態 | 已發佈 - 1999 |
ASJC Scopus subject areas
- 電子、光磁材料
- 凝聚態物理學