Evidence of the effect of the apical oxygen on the superconductivity of Y1-xCaxBa2Cu3Oy. An O-1s X-ray absorption spectroscopy study

C. H. Hsieh; C. N. Chang; S. B. Lee; H. C.I. Kao; C. H. Chin

doi:10.1016/S0921-4534(02)01966-4

Evidence of the effect of the apical oxygen on the superconductivity of Y_1-xCa_xBa₂Cu₃O_y. An O-1s X-ray absorption spectroscopy study

C. H. Hsieh, C. N. Chang^*, S. B. Lee, H. C.I. Kao, C. H. Chin

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Two series of Y_1-xCa_xBa₂Cu₃O_y, x = 0.05 and 0.10, have been studied by O-1s X-ray absorption near-edge spectroscopy using synchrotron radiation. The characteristics of the decrease of T_c with the decrease of the oxygen content, y, are found different for the series of x = 0.05 and x = 0.10. The former reveals the importance of the holes on the apical oxygen sites. Through a cross examination between these two series of samples, direct evidences are observed that the reduction of the number of holes on the apical oxygen sites has a negative effect on the superconductivity in the underdoped region of Ca-doped YBCO system.

Original language	English
Pages (from-to)	314-320
Number of pages	7
Journal	Physica C: Superconductivity and its applications
Volume	384
Issue number	3
DOIs	https://doi.org/10.1016/S0921-4534(02)01966-4
Publication status	Published - 2003 Feb 1

Keywords

High-T superconductor
X-ray absorption spectrum
YCaBaCuO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4534(02)01966-4

Cite this

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title = "Evidence of the effect of the apical oxygen on the superconductivity of Y1-xCaxBa2Cu3Oy. An O-1s X-ray absorption spectroscopy study",

abstract = "Two series of Y1-xCaxBa2Cu3Oy, x = 0.05 and 0.10, have been studied by O-1s X-ray absorption near-edge spectroscopy using synchrotron radiation. The characteristics of the decrease of Tc with the decrease of the oxygen content, y, are found different for the series of x = 0.05 and x = 0.10. The former reveals the importance of the holes on the apical oxygen sites. Through a cross examination between these two series of samples, direct evidences are observed that the reduction of the number of holes on the apical oxygen sites has a negative effect on the superconductivity in the underdoped region of Ca-doped YBCO system.",

keywords = "High-T superconductor, X-ray absorption spectrum, YCaBaCuO",

author = "Hsieh, {C. H.} and Chang, {C. N.} and Lee, {S. B.} and Kao, {H. C.I.} and Chin, {C. H.}",

note = "Funding Information: This work is supported partly by the National Science Council of the Republic of China under the project no. NSC 89-2112-M-003-029. We appreciate the fully support of the staff in SRRC.",

year = "2003",

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doi = "10.1016/S0921-4534(02)01966-4",

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T1 - Evidence of the effect of the apical oxygen on the superconductivity of Y1-xCaxBa2Cu3Oy. An O-1s X-ray absorption spectroscopy study

AU - Hsieh, C. H.

AU - Chang, C. N.

AU - Lee, S. B.

AU - Kao, H. C.I.

AU - Chin, C. H.

N1 - Funding Information: This work is supported partly by the National Science Council of the Republic of China under the project no. NSC 89-2112-M-003-029. We appreciate the fully support of the staff in SRRC.

PY - 2003/2/1

Y1 - 2003/2/1

N2 - Two series of Y1-xCaxBa2Cu3Oy, x = 0.05 and 0.10, have been studied by O-1s X-ray absorption near-edge spectroscopy using synchrotron radiation. The characteristics of the decrease of Tc with the decrease of the oxygen content, y, are found different for the series of x = 0.05 and x = 0.10. The former reveals the importance of the holes on the apical oxygen sites. Through a cross examination between these two series of samples, direct evidences are observed that the reduction of the number of holes on the apical oxygen sites has a negative effect on the superconductivity in the underdoped region of Ca-doped YBCO system.

AB - Two series of Y1-xCaxBa2Cu3Oy, x = 0.05 and 0.10, have been studied by O-1s X-ray absorption near-edge spectroscopy using synchrotron radiation. The characteristics of the decrease of Tc with the decrease of the oxygen content, y, are found different for the series of x = 0.05 and x = 0.10. The former reveals the importance of the holes on the apical oxygen sites. Through a cross examination between these two series of samples, direct evidences are observed that the reduction of the number of holes on the apical oxygen sites has a negative effect on the superconductivity in the underdoped region of Ca-doped YBCO system.

KW - High-T superconductor

KW - X-ray absorption spectrum

KW - YCaBaCuO

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