期刊
PHYSICAL REVIEW B
卷 88, 期 13, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.88.134525
关键词
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资金
- National Science Council of Taiwan, R.O.C. [NSC-101-2112-M-009-017-MY2, NSC-101-2112-M-009-020, NSC-98-2112-M-009-016-MY2, NSC-100-2112-M-259-002-MY3]
- MOE ATU program at NCTU
- ALS
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.
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