OXIDATION-STATE OF MERCURY IN HGBA2(CA0.86SR0.14)(2)CU3O8-RAY PHOTOELECTRON-SPECTROSCOPY(DELTA STUDIED BY X)

Authors
GOPINATH CS HUR NH SUBRAMANIAN S
Citation
Cs. Gopinath et al., OXIDATION-STATE OF MERCURY IN HGBA2(CA0.86SR0.14)(2)CU3O8-RAY PHOTOELECTRON-SPECTROSCOPY(DELTA STUDIED BY X), Physical review. B, Condensed matter, 52(14), 1995, pp. 9879-9881
Citations number
31
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
52
Issue
14
Year of publication
1995
Pages
9879 - 9881
Database
ISI
SICI code
0163-1829(1995)52:14<9879:OOMIHP>2.0.ZU;2-F
Abstract
Hg 4f core levels of HgBa2(Ca0.86Sr0.14)(2)Cu3O8+delta(Hg-1223) and Hg O were measured by x-ray photoelectron spectroscopy in order to demons trate the oxidation state of mercury ions in the superconducting oxide . The binding energy of the Hg 4f(7/2) level is found to be at 99.9 eV in HgO and 101.0 and 103.4 eV in Hg-1223. This result reveals that th e oxidation state of Hg is definitely more than +2 and it exists in a mixed-valent state. The creation of charge carriers in Hg-1223 is disc ussed in terms of a charge transfer between Hg-O-delta and Cu-O layers .