TY - JOUR
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.
UR - http://www.scopus.com/inward/record.url?scp=0029409367&partnerID=8YFLogxK
U2 - 10.1016/0921-4534(95)00528-5
DO - 10.1016/0921-4534(95)00528-5
M3 - Article
AN - SCOPUS:0029409367
SN - 0921-4534
VL - 253
SP - 351
EP - 356
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 3-4
ER -