X-ray photoelectron spectroscopy study of HgBa2CuO4+δ

Hyeong Do Kim; S. J. Oh; In Sang Yang; Nam H. Hur

doi:10.1016/0921-4534(95)00528-5

X-ray photoelectron spectroscopy study of HgBa₂CuO_4+δ

Hyeong Do Kim, S. J. Oh, In Sang Yang, Nam H. Hur

Department of Physics

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

22 Scopus citations

Abstract

X-ray photoelectron spectroscopy was used to investigate the oxidation states of Hg and Cu ions in the HgBa₂CuO_4+δ compound. In contrast to the previous report on the scraped samples [C.S. Gopinath and S. Subramanian, Physica C 232 (1994) 222], our spectra from the fresh surfaces of fractured samples do not show the unusual 3 + oxidation state of Hg ions, while the satellite structure of the Cu 2p_{3 2} core-level spectrum which indicates the 2 + oxidation state of Cu ions is observed. These results confirm that, in the HgBa₂CuO_4+δ compound, the Hg atom does not act as an electron reservoir, and that the CuO layers are hole-doped due to the extra oxygens in the HgO_δ planes.

Original language	English
Pages (from-to)	351-356
Number of pages	6
Journal	Physica C: Superconductivity and its Applications
Volume	253
Issue number	3-4
DOIs	https://doi.org/10.1016/0921-4534(95)00528-5
State	Published - 1 Nov 1995

Bibliographical note

Funding Information:
This work was supportedb y a grant from the Ministryo f Sciencea ndT echnologyK,o rea.

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10.1016/0921-4534(95)00528-5

Cite this

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title = "X-ray photoelectron spectroscopy study of HgBa2CuO4+δ",

abstract = "X-ray photoelectron spectroscopy was used to investigate the oxidation states of Hg and Cu ions in the HgBa2CuO4+δ compound. In contrast to the previous report on the scraped samples [C.S. Gopinath and S. Subramanian, Physica C 232 (1994) 222], our spectra from the fresh surfaces of fractured samples do not show the unusual 3 + oxidation state of Hg ions, while the satellite structure of the Cu 2p 3 2 core-level spectrum which indicates the 2 + oxidation state of Cu ions is observed. These results confirm that, in the HgBa2CuO4+δ compound, the Hg atom does not act as an electron reservoir, and that the CuO layers are hole-doped due to the extra oxygens in the HgOδ planes.",

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note = "Funding Information: This work was supportedb y a grant from the Ministryo f Sciencea ndT echnologyK,o rea.",

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T1 - X-ray photoelectron spectroscopy study of HgBa2CuO4+δ

AU - Kim, Hyeong Do

AU - Oh, S. J.

AU - Yang, In Sang

AU - Hur, Nam H.

N1 - Funding Information: This work was supportedb y a grant from the Ministryo f Sciencea ndT echnologyK,o rea.

PY - 1995/11/1

Y1 - 1995/11/1

N2 - X-ray photoelectron spectroscopy was used to investigate the oxidation states of Hg and Cu ions in the HgBa2CuO4+δ compound. In contrast to the previous report on the scraped samples [C.S. Gopinath and S. Subramanian, Physica C 232 (1994) 222], our spectra from the fresh surfaces of fractured samples do not show the unusual 3 + oxidation state of Hg ions, while the satellite structure of the Cu 2p 3 2 core-level spectrum which indicates the 2 + oxidation state of Cu ions is observed. These results confirm that, in the HgBa2CuO4+δ compound, the Hg atom does not act as an electron reservoir, and that the CuO layers are hole-doped due to the extra oxygens in the HgOδ planes.

AB - X-ray photoelectron spectroscopy was used to investigate the oxidation states of Hg and Cu ions in the HgBa2CuO4+δ compound. In contrast to the previous report on the scraped samples [C.S. Gopinath and S. Subramanian, Physica C 232 (1994) 222], our spectra from the fresh surfaces of fractured samples do not show the unusual 3 + oxidation state of Hg ions, while the satellite structure of the Cu 2p 3 2 core-level spectrum which indicates the 2 + oxidation state of Cu ions is observed. These results confirm that, in the HgBa2CuO4+δ compound, the Hg atom does not act as an electron reservoir, and that the CuO layers are hole-doped due to the extra oxygens in the HgOδ planes.

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