摘要
The total spectral weight S of the emergent low-energy quasiparticles in high-temperature superconductors (HTSCs) is explored by x-ray absorption spectroscopy. In order to examine the applicability of the Hubbard model, regimes that cover from zero doping to overdoping are investigated. In contrast to results of mean-field theory, we found that S deviates from linear dependence on the doping level p. The slope of S versus p changes continuously throughout the whole doping range with no sign of saturation up to p=0.23. Therefore, the picture of the Zhang-Rice singlet remains intact within the most prominent doping regimes of HTSCs.
原文 | English |
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文章編號 | 134525 |
頁數 | 5 |
期刊 | Physical Review B - Condensed Matter and Materials Physics |
卷 | 88 |
發行號 | 13 |
DOIs | |
出版狀態 | Published - 31 10月 2013 |