Doping evolution of Zhang-Rice singlet spectral weight: A comprehensive examination by x-ray absorption spectroscopy

被引：20

作者：

Chen, Y. -J. ^{[1
]}

Jiang, M. G. ^{[2
]}

Luo, C. W. ^{[1
]}

Lin, J. -Y. ^{[2
]}

Wu, K. H. ^{[1
]}

Lee, J. M. ^{[3
]}

Chen, J. M. ^{[3
]}

Kuo, Y. K. ^{[4
]}

Juang, J. Y. ^{[1
]}

Mou, Chung-Yu ^{[5
,6
]}

机构：

[1] Natl Chiao Tung Univ, Dept Electrophys, Hsinchu 30010, Taiwan

[2] Natl Chiao Tung Univ, Inst Phys, Hsinchu 30010, Taiwan

[3] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

[4] Natl Dong Hwa Univ, Dept Phys, Hualien 97401, Taiwan

[5] Natl Tsing Hua Univ, Dept Phys, Hsinchu 30043, Taiwan

[6] Natl Ctr Theoret Sci, Div Phys, Hsinchu, Taiwan

来源：

PHYSICAL REVIEW B | 2013年 / 88卷 / 13期

关键词：

ELECTRONIC-STRUCTURE; DOPED HOLES; SUPERCONDUCTOR; OXYGEN;

D O I：

10.1103/PhysRevB.88.134525

中图分类号：

T [工业技术];

学科分类号：

08 ;

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.

引用

页数：5

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